2025 Sustainability Report

The 2025 Sustainability Report provides a high-level view of how Edison International is advancing its sustainability vision through strategy, operations and governance, and how those efforts create value for customers, communities, employees and investors. The report highlights progress and priorities of Edison International and its subsidiaries, Southern California Edison (SCE) and Trio,1 during the past year.

The report's content and organization are informed by Edison International's 2025 double materiality assessment,2 which identified the sustainability topics that are significant to stakeholders and relevant to Edison International's long-term business strategy. (See Material Sustainability Topics.)

Topics are grouped into priority topics - areas of greatest financial, environmental or social impact - and foundational topics that are core to the business and enable ongoing success.

A Message From Our CEO 4

About Edison International 5

Material Sustainability Topics 6

Sustainability Goals 7

2025 Year in Review 8

Accolades 9

1. Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the California Public Utilities Commission (CPUC).

2. The terms "material" or "materiality" in connection with Edison International's sustainability materiality assessment are different from the definition of materiality under U.S. securities laws. Therefore, material sustainability topics should not be construed or characterized as being material under U.S. securities laws or for any other purpose.

Introduction Priority Topics Foundational Topics Appendix 4

A Message From Our CEO About Edison International Material Sustainability Topics Sustainability Goals 2025 Year in Review Accolades

As climate change impacts intensify, the need to deliver a clean energy future that is reliable, resilient and affordable is more urgent than ever. Across California, communities are experiencing more extreme weather and heightened wildfire risk, even as the electric utility sector works to meet ambitious climate goals and support growing electricity demand.

These realities reinforce the need to invest in a future-ready electric system that puts customers first and strengthens community resilience. Edison International and our subsidiaries, SCE and Trio,1 remain committed to supporting the clean energy transition while maintaining the safety, reliability and affordability that our customers expect.

This Sustainability Report details our progress in 2025, a year marked by expectations of rising electricity demand and increased focus on affordability and climate resilience.

Investing in a Reliable, Resilient and Ready Grid

Meeting California's climate goals requires sustained investment in grid infrastructure and new technologies, supported by a continued focus on operational excellence.

Throughout 2025, SCE strengthened the electric system, mitigated wildfire risk and supported recovery in fire-impacted communities. By year-end, SCE had made substantial progress toward planned grid hardening efforts. These upgrades reduce ignition risk and improve reliability for the communities we serve.

The Eaton and Palisades fires that began in January 2025 had a profound and lasting impact. SCE worked quickly to safely restore power and launched its Wildfire Recovery Compensation Program to aid Altadena's recovery and rebuilding. This program reflects our commitment to provide quick, compassionate support and to help community members take steps forward.

California's clean energy future depends on a grid that integrates cleaner resources, supports electrification, withstands climate challenges and helps protect against cyberattacks. Energy storage plays an increasingly important role in enhancing reliability and supporting renewables integration. SCE has one of the nation's largest energy storage portfolios.

As is the case nationwide, accelerating speed to power remains critical. Broad agreement exists across parties on the need to address siting and permitting delays - the main barrier to meeting rising electricity demand and integrating renewable resources. Federal, state and local leaders must enact clear, coordinated and efficient permitting reforms, enabling utilities to deliver a clean, electrified future without delay.

Advancing an Affordable, Reliable and Safe Clean Energy Future for All

Affordability, safety, reliability and resilience remain central to our commitment to customers as California advances the clean energy transition.

At SCE, this commitment is evident in both our customer support and the way SCE manages its business. SCE offers its customers tools, such as bill payment options, programs and technology, to help customers manage their bills. Nearly one-third of SCE's 4 million-plus residential customers receive substantial bill relief. SCE has consistently maintained the lowest system average rate among California's major investor-owned utilities for more than 15 years and projects rate growth at or below inflation through 2030.

Edison International's focus on disciplined cost management, strong operational performance and capital efficiency attracts investment in safety, reliability and clean energy while keeping customer bills as low as possible.

Building the Future Workforce

We are committed to investing in the workforce needed to deliver the energy system of the future. Through programs such as the Lineworker Scholarship, now in its sixth year and offered in partnership with IBEW Local 47, and the Edison Scholars program, we are helping build pathways into the skilled trades and science, technology, engineering and mathematics (STEM) careers while strengthening the long-term workforce needed to support a clean energy future. Since 2006, the Edison Scholars program has granted more than $20.8 million in scholarships to 820 students. These programs are funded by Edison International shareholders.

Looking Ahead

I am proud of our team and the progress we continue to make toward a clean energy future that benefits everyone. Looking ahead, we will continue to put customers first - by strengthening the grid, mitigating wildfire risk and advancing clean energy to support affordability and community resilience for generations to come.

1. Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

PEDRO J. PIZARRO

President and Chief Executive Officer

Introduction Priority Topics Foundational Topics Appendix 5

A Message From Our CEO About Edison International Material Sustainability Topics Sustainability Goals 2025 Year in Review Accolades

Edison's Values

Safety

Respect

Excellence

Continuous Improvement

Integrity

Teamwork

Edison International by the Numbers

$19.3B+ 13,000+

revenue employees

50,000+ $7B+

square-mile SCE service SCE planned annual capital area across Southern, investments in a safe, Central and Coastal California reliable clean energy grid

125,000+

miles of SCE distribution and transmission lines

48

number of the world's largest companies served by Trio

15M

residents served

5M+

customer accounts in SCE service area

$26M

annual philanthropic contributions3

50%

female board members4

Edison International is one of the nation's largest electric utility holding companies, providing clean and reliable energy and energy services through its subsidiaries.

Headquartered in Rosemead, California, Edison International is the parent company of SCE, a utility that delivers electricity to 15 million people across Southern, Central and Coastal California, and Trio,1 a global energy advisory firm serving large corporate, industrial and

institutional customers. Edison International's vision is to lead the transformation of the electric power industry toward a resilient clean energy future while delivering long-term value to customers and shareholders.

Edison International's principal subsidiary, SCE, is a wires-focused electric utility dedicated to strengthening and modernizing the grid; achieving operational and service excellence; proactively mitigating climate-related risks, including wildfires; and advancing affordable clean power and electrification. Approximately 17%2 of SCE's electricity sales comes from its own generation. Trio, an unregulated subsidiary, partners with leading organizations - including 48 of the world's largest companies - to help set and achieve sustainability goals and navigate the transition to a net-zero future. Trio recently expanded its geographic footprint in Europe and now does business in more than 30 countries.

1. Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

2. Metric represents a five-year average.

3. Total reflects contributions made by Edison International and the Edison International Foundation, and is inclusive of the company's volunteer grants and matching gifts.

4. As of April 2026, 50% of Edison International's total Board of Directors was female and 55% of independent directors were female.

Introduction Priority Topics Foundational Topics Appendix 6

A Message From Our CEO About Edison International Material Sustainability Topics Sustainability Goals 2025 Year in Review Accolades

In 2025, Edison International completed its first sustainability double materiality assessment1 (DMA). The DMA aligns with emerging best practices by evaluating both financial risks and opportunities for the business and potential impacts on people and the environment. The assessment reflects evolving sustainability priorities, emerging trends and Edison International's current business context and informs our sustainability approach, strategy and reporting.

Edison International identified 23 sustainability topics that are material under the DMA, including 13 priority and 10 foundational topics, that represent significant financial, environmental and social impacts or substantively influence stakeholder assessments and decisions. These topics closely align with the priorities in Edison International's 2021 single materiality assessment and remain consistent with Edison International's corporate strategy.

The assessment incorporated internal documentation, expert interviews, executive feedback and external data analysis, with results shared with the Board of Directors. Additional details, including topic definitions, can be found on Edison International's DMA website.

2025 Double Materiality Assessment

Priority Topics Financial + Impact

• Clean Energy Transition

• Energy Affordability

• Grid Readiness & Load Growth

• Regulatory & Legislative Policy

• Wildfire Risk Management

  Financial

• Electrification

  Impact

• Climate Change Adaptation & Mitigation

• Customers & Communities

• Cybersecurity

• Employee & Contractor Safety

• Public Safety

• Reliability & Resilience

• Workforce Strategy

  Foundational Topics

• Air Quality Emissions

• Biodiversity & Habitat

• Business Resiliency & Physical Security

• Corporate Governance

• Enterprise Digital Transformation

• Ethics & Compliance

• Labor & Employee Relations

• Supply Chain Management

• Waste & Hazardous Materials Management

• Water Management

The following visual summarizes the results of the 2025 DMA, highlighting the priority and foundational topics most relevant to Edison International and its stakeholders.

1. Priority topics represent the issues most impactful to Edison International and align with our strategic priorities.

   Topics are organized based on whether their sustainability materiality was driven by financial considerations, impacts to people or the environment, or both.

2. Foundational topics are important to Edison International's business operations, support the long-term success of

our strategic objectives and will continue to be included in disclosures.

1 The terms "material" or "materiality" in connection with our sustainability materiality assessment are different from the definition of materiality under U.S. securities laws. Therefore, material sustainability topics should not be construed or characterized as being material under U.S. securities laws or for any other purpose.

Introduction Priority Topics Foundational Topics Appendix 7

A Message From Our CEO About Edison International Material Sustainability Topics Sustainability Goals 2025 Year in Review Accolades

Public Safety No serious injuries to the public due to system failure.

Edison International's sustainability goals reflect long-term commitments focused on material environmental and social priorities.

For additional details, including year-over-year performance, see Sustainability Goals. For a broader set of sustainability-related metrics, see the Sustainability Scorecard in the Appendix.

Employee and Contractor Safety

Net-Zero Commitment

No worker (employee or contractor) fatalities.

Measure employee psychological safety culture through the safety culture assessment.1

Achieve net-zero greenhouse gas (GHG) emissions across Scopes 1, 2 and 3 by 2045, in alignment with economywide climate actions planned by the state of California. This covers the power SCE delivers to customers and Edison International's enterprisewide operations, including our supply chain.2

Clean Energy Transition

Deliver 100% carbon-free electricity in terms of retail sales to SCE customers by 2045.

1. Beginning in 2027, the CPUC will begin conducting comprehensive safety culture assessments every four years, with the first results available in 2028..

2. Achieving this net-zero goal is contingent on regulatory approvals and availability of viable carbon removal or offset technologies in 2045 for remaining emissions.

3. CPUC Resolution E-5257 OP 7 approved SCE's recommendation to reduce the minimum number of sites from 870 to 500, with 8,490 vehicles to be committed by Dec. 31, 2026.

4. Charge Ready Light-Duty vehicle programs do not have an overall site installation target; associated site counts are forecasted based on the current project pipeline.

5. This goal was updated to reflect BRG business plans and alignment with Edison International's workforce objectives.

Electrification

Workforce Development and Inclusion5

By 2026, obtain SCE customer commitments to deploy 8,490 medium- and heavy-duty electric vehicles (EVs) at 500 sites through SCE's Charge Ready Transport program.3

By 2026, obtain SCE customer commitments to deploy (or commit to deploy for utility-owned installations) approximately 30,000 EV charge ports to serve 1,300 sites4 through SCE's Charge Ready Light Duty EV charging programs.

By 2030, within SCE's transportation fleet, electrify 100% of light-duty vehicles, 30% of medium-duty vehicles, 8% of heavy-duty vehicles and 60% of forklifts.

Improve employee experience through the execution of Business Resource Group (BRG) business plans.

Introduction Priority Topics Foundational Topics Appendix 8

A Message From Our CEO About Edison International Material Sustainability Topics Sustainability Goals 2025 Year in Review Accolades

‌2025 YEAR IN REVIEW

Customers & Communities

Edison International and the Edison International Foundation awarded 632 grants totaling

$25.8 million to support nonprofit partners and community-based organizations.

Edison International's employees, along with family and friends, volunteered approximately 41,000 hours - representing an estimated

$1.6 million in value.

SCE's Energy Education Center hosted more than 590 classes, both online and in-person, with nearly 34,000 attendee visits across all sessions.

Reliability & Resilience

SCE inspected approximately 1.6 million trees, including more than 800,000 in high fire risk areas (HFRAs).

SCE continued grid hardening, resulting in nearly 7,100 total miles of covered conductor by year-end.

SCE demand response programs provided more than 800 megawatts (MW) of capacity available to be dispatched during periods of grid stress and high energy prices.

Clean Energy Transition

SCE delivered at least 60% carbon-free electricity in terms of retail sales to customers in 2025, over 70% cleaner than the national average GHG intensity.1

SCE contracted approximately 900 MW of energy storage in 2025, bringing the total to approximately 9,200 MW owned or under contract - one of the largest portfolios in the nation.

Trio2 advised on almost 1,000 MW of renewable energy power purchase agreements (PPAs) in 2025, bringing the total to over 13,600 MW since 2013.3

1. U.S. national average for data year 2024 is 340.9 kg. carbon dioxide equivalent per megawatt hour (CO2e/MWh) or 0.34 metric tons CO2e/MWh. The U.S. Environmental Protection Agency (EPA) no longer maintains certain GHG-related databases; alternative sources have assumed responsibility for updating these values. Currently, SCE utilizes the Cornerstone Sustainability Data Initiative, which employs the same open-source model previously used by the EPA.

2. Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

3. Cumulative PPA totals include legacy Altenex advisory activity prior to Trio's acquisition.

Edison International | 2025 Sustainability Report | June 2026

Introduction Priority Topics Foundational Topics Appendix 9

A Message From Our CEO About Edison International Material Sustainability Topics Sustainability Goals 2025 Year in Review Accolades

Edison International and its subsidiaries (where noted) received wide-ranging recognition, including the following awards:

Clean Energy Transition & Operational Excellence

97th Annual Edison Award for AI grid innovation Edison Electric Institute - SCE

America's Most JUST Companies JUST Capital - Edison International

Francis Upton Top Innovator in Analytics for Utility Service Award

Public Utilities Fortnightly - SCE

President's Award: Advanced Waveform Anomaly Recognition (AWARE) system

Association of Edison Illuminating Companies - SCE

Governance

United Nations Sustainable Development Goals 2025 Business Pioneer Award

UN/Bosnia-Herzegovina - Trio1

"GB" (Gender-Balanced) Corporation

50/50 Women on Boards - Edison International

"Trendsetter" on the CPA-Zicklin Index of Corporate Political Disclosure and Accountability for 10th consecutive year and received 100% score for the last four years Center for Political Accountability - Edison International

"A" rating

Global Listed Infrastructure Organisation - Edison International

Leadership Recognition

Irving Innovation Award

Scholarship America - Edison International

Pedro Pizarro among LA500 Civic Leaders

Los Angeles Business Journal - Edison International

Pedro Pizarro featured among Latinos on Boards Latino Leaders - Edison International

Pedro Pizarro named 2026 Excellence in Leadership Power Player Award winner

Smart Electric Power Alliance - Edison International

1. Trio operates under Edison Energy, LLC, an indirect, wholly-owned, non-utility subsidiary of Edison International, and is a global energy advisory firm providing integrated sustainability and energy solutions to commercial, industrial and institutional customers. Trio is not the same company as SCE, the utility, and Trio is not regulated by the CPUC.

Edison International | 2025 Sustainability Report | June 2026

Impact

• Climate Change Adaptation & Mitigation

• Customers & Communities

• Cybersecurity

• Employee & Contractor Safety

• Public Safety

• Reliability & Resilience

• Workforce Strategy

Priority sustainability material topics represent the areas that are most impactful for Edison International and align with our strategic priorities:

Building & Maintaining a Reliable, Resilient & Ready Grid 11

Leading an Affordable Clean

Energy Transition 21

Customers, Communities &

Stakeholder Engagement 38

Safety, Cybersecurity & Workforce Strategy 47

Introduction Priority Topics Foundational Topics Appendix 11

Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Sustainability material topics covered in this section:

• Grid Readiness, Resilience & Load Growth

• Reliability

• Wildfire Risk Management

• Climate Adaptation

Grid Readiness, Resilience & Load Growth

SCE is modernizing its electric grid through strategic investments in advanced infrastructure and digital technologies that support widespread electrification, load growth and clean energy goals while enabling smarter, more affordable customer energy solutions.

Grid Modernization

For electricity delivered by California's grid to be carbon-free by 2045 while maintaining reliability and affordability, the grid will need fundamental changes in how it is planned, designed, built and operated. SCE expects load growth between 30% and 40% by 2035, and a near doubling by 2045 relative to 2025 levels.

Meeting this forecasted growth will require long-term grid expansion and modernization, including updates to design standards, system planning assumptions and operational practices - while balancing affordability and broad access to power so all customers and communities benefit from the clean energy transition.

1 See the CPUC Decision Fact Sheet on SCE's 2025 General Rate Case.

More Power From Existing Power Lines

California's appetite for electricity is growing fast. Electricity use is rising as more people adopt EVs, plug in new technology and electrify homes and businesses. In addition to building wholly new transmission lines where necessary, SCE is upgrading existing ones with advanced wire that can carry significantly more electricity.

This new conductor technology has a carbon fiber core that makes it a lot lighter and allows more power to move through the lines, increasing capacity by 25% to 80% with the same footprint. Upgrading existing lines complements new transmission development, providing a faster, more efficient way to modernize the grid and prepare communities for future growth.

Read the full story on ENERGIZED.

SCE plans to invest approximately $38 billion to $41 billion in capital expenditures from 2026 through 2030,1 reflecting sustained, regulated investment that supports safe, reliable and resilient service while advancing California's clean energy objectives. Subject to regulatory approval, these investments are expected to be added to rate base over time and

support long-term value creation through improved system performance.

SCE collaborates across the industry and with government agencies to advance technologies that enable power-supply decarbonization and support the shift toward EVs and all-electric buildings. SCE is particularly focused on grid-related technologies, such as distributed energy resources, energy storage and predictive analytics to support the clean

energy transition.

Technology advancements in grid software and hardware have fostered continued progress in strengthening and modernizing the electric grid. However, the grid's underlying design and architecture have not evolved at the same pace as its component technologies.

SCE anticipates the grid will face frequent and more intense climate-driven disruptions. Impacts will vary by location based on topography, urbanization, localized climate vulnerabilities and existing infrastructure - reinforcing the need for a climate-resilient grid tailored to regional conditions.

Engineering for the Grid of the Future

In 2025, SCE continued advancing distribution automation, field sensors and advanced communications to strengthen real-time monitoring and dynamic response to system disturbances.

These capabilities support automated switching, faster restoration and improved coordination with distributed energy resources, helping the grid operate safely and reliably while preparing for continued load growth.

Advanced Metering Infrastructure (AMI) 2.0 is the next generation of SCE's smart metering platform, designed to replace aging AMI 1.0 technology and modernize meters, communications networks and supporting data systems. In 2025, SCE advanced AMI 2.0 through detailed program planning, system and data architecture conceptual design

and cross-functional coordination to prepare for large-scale deployment. This work will lead to significant improvements in safety and reliability and will be foundational to affordable realization of California electrification and renewable energy adoption policy goals by enabling far greater demand flexibility than would otherwise be possible.

SCE also continued deploying the electric industry's first private 5G Field Area Network (FAN) in partnership with Nokia. The 5G FAN enables secure, real-time communication with power lines, substations and field equipment, allowing crews to detect faults more quickly, remotely access hard-to-reach assets and collect smart meter data. Together, these capabilities improve reliability today and establish a foundation to invest in technologies to manage integration of renewable energy resources and support a more resilient, adaptable grid.

Introduction Priority Topics Foundational Topics Appendix 12

Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

FAN will provide high-speed, low-latency communications between the Grid Management System (GMS) and distribution automation field devices, essential components in modern power distribution systems. These devices help automate and optimize grid operations and distribution by protecting and monitoring lines, controlling voltage and sectionalizing circuits to minimize disruptions from outages.

SCE initially launched the new GMS with the deployment of Advanced Distribution Management System capabilities at SCE's El Dorado and Rector switching centers. Switching centers oversee the flow of electricity between the higher-voltage sub-transmission systems and lower-voltage distribution systems. They allow one centralized operator to oversee the whole system and control how electricity moves across the center's service area. In 2025, these capabilities were deployed to all of SCE's switching centers. GMS will continue contributing to enhanced reliability while helping to integrate distributed energy resources (DERs) on SCE's grid. As climate-driven disruptions become increasingly severe, GMS helps SCE manage regional operations and integrate DERs where needed.

As part of GMS modernization, SCE is implementing Fault Location, Isolation and Service Restoration (FLISR) to support faster fault identification and electric service restoration during distribution system faults. FLISR uses available system data and automated switching logic to isolate faulted sections and restore service to unaffected customers, helping reduce outage duration and improve overall system reliability.

SCE's Smart City project is developing a standard approach for deploying front-of-the-meter microgrids. The demonstration - a partnership with the city of Porterville's Water Treatment Plant - supports a community microgrid that helps essential facilities maintain electric service during outages. Smart City aims to fully implement and support the use of both customer-and utility-owned DERs to operate the front-of-the-meter microgrid, enhancing resilience while maintaining safety and reliability through minimally disruptive islanding

and reconnection.

Emerging Technologies & Integrating Artificial Intelligence (AI) Into

SCE's Operations

SCE is continuing to apply advanced computing and AI in select planning, engineering and operational processes to improve insight, reduce operational risk, support more cost-effective planning and streamline work while maintaining safety and reliability. These efforts represent early steps toward broader integration as solutions mature.

Available Load Capacity Heat Maps visualize capacity across the grid using color indicators, helping interconnection customers identify areas with limited or available capacity and make more informed siting decisions.

SCE's distribution fault detection and location software, known as AWARE (Advanced Waveform Anomaly Recognition), combines advanced fault modeling, signal processing algorithms and machine learning models with high-fidelity waveform data, advanced metering infrastructure information, grid models and real-time Supervisory Control and Data Acquisition data to detect early signs of equipment failure and estimate locations - supporting faster, safer field investigations.

Intelligent Design and Construction - Substation Design (IDC-SD) Automation modernizes how substations are designed and delivered by transforming manual, 2D computer-aided design into intelligent, parameter-based schematics and 3D models that embed engineering standards, equipment data and design rules.

By automating repetitive design tasks and enabling rule-based validation, IDC-SD improves design quality and consistency, reduces rework and shortens design cycle times. This automation accelerates grid infrastructure delivery, helping SCE make more efficient use of engineering resources.

Expanding grid capabilities requires innovation across technology and the supply chain. SCE is working with suppliers to develop hardware and software solutions that address regional grid needs and support increasingly complex operations, including the integrations of DERs, using sensors, high-speed and high-volume communications technologies, edge computing, predictive analytics and AI.

In 2025, SCE initiated multiple grid digitalization pilots to evaluate how digital twins, advanced analytics, automation and emerging field technologies can improve workforce productivity, safety and planning accuracy. These efforts supported faster system modeling, virtual job walks, AI-assisted engineering design, decision-support tools, and smarter project scoping

and routing by improving access to land rights and permitting information and reducing the risk of rework.

SCE also piloted advanced inspection and patrol techniques, including the use of drones during Public Safety Power Shutoff events, to enhance situational awareness while reducing safety risks. While not yet deployed systemwide, early results demonstrate opportunities to reduce cycle time, improve data quality and enable safer, more efficient grid work execution, providing a pathway for broader adoption.

To support timelines for electrification and grid connections, SCE continued advancing bridging solutions that align customer demand with available grid capacity. The Flexible Service Connection program progressed beyond the pilot stage, enabling customers to manage load in coordination with grid conditions and energize without delay. SCE also received its first two relocatable 1 MW energy storage units in late 2025, which can be deployed much more rapidly than traditional infrastructure. Additional customer deployments are planned for 2026.

Introduction Priority Topics Foundational Topics Appendix 13

Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Reliability

SCE uses a data-driven approach to identify system risks, prioritize investments and deploy targeted solutions that strengthen grid resilience and protect vulnerable populations as climate hazards and operational complexity increase.

In 2025, overall reliability performance declined compared to 2024, as measured by the System Average Interruption Duration Index (SAIDI) and Customer Average Interruption Duration Index (CAIDI). SAIDI increased by 16 minutes and CAIDI increased by 10 minutes. These results reflect a combination of evolving risk conditions, operational changes to mitigate wildfire threats and asset aging in specific portions of the system.

Despite these challenges, SCE made progress on key reliability drivers. Distribution overhead conductor failures declined in 2025, reflecting the effectiveness of sustained grid hardening investments, particularly in HFRAs. These improvements demonstrate that targeted wildfire mitigation and infrastructure reinforcement efforts are delivering measurable

reliability benefits.

SCE is also renewing its focus on hardening infrastructure in non-HFRAs, including replacing bare wire with covered

conductor and upgrading underground cables and equipment. These actions complement ongoing wildfire mitigation investments and support improved reliability performance over time.

Additional impacts on 2025 performance include operational changes implemented to reduce wildfire ignition risk, such as more sensitive settings to faults and failures, which can extend restoration durations. These outcomes reflect the necessary balance between safety, reliability and risk mitigation under increasingly dynamic conditions.

Reliability Performance

SAIDI1

Cumulative Duration (in minutes) of Sustained Repair Outages Experienced by the Average SCE Customer in a Year

116

96 100

20234 20244 20254

CAIDI2

Average Repair Outage Duration (in minutes) per SCE Customer Interruption (average time to restore service)

102 111 121

20234 20244 20254

SAIFI3

Number of Sustained Repair Outages (power outage lasting longer than five minutes) Experienced by the Average SCE Customer in a Year

0.94 0.90 0.96

20234 20244 20254

System Average Interruption Frequency Index (SAIFI) performance also declined in 2025, with the number of SCE customers experiencing outages increasing by approximately 6%, or roughly 300,000 customers, the highest level observed since 2015. This trend reflects the same underlying drivers impacting SAIDI and underscores the importance of continued targeted investments to address both outage frequency

and duration.

SCE is using insights from recent performance trends to refine asset strategies, operational practices and investment priorities. As wildfire hardening benefits are realized and as grid modernization continues, focus on SCE's underground system reliability is expected to improve.

In addition to using SAIDI and SAIFI indices, SCE is increasingly assessing customer-level reliability to determine where to focus improvement efforts. Specifically, SCE examines additional metrics, such as Customers Experiencing Multiple Interruptions and Customers Experiencing Long Interruption Duration, to identify where to deploy remediations to improve

customer experience.

1. SAIDI: A higher score means more cumulative minutes of interruption per customer and, thus, a worse performance.

2. CAIDI: A higher score means a longer average duration per interruption and, thus, a worse performance.

3. SAIFI: A higher score means a greater number of sustained outages per customer and, thus, a worse performance.

4. Excluding Major Event Days (MEDs).

Introduction Priority Topics Foundational Topics Appendix 14

Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Refurbished Transformers Keep Power Flowing

When the heat cranks up, the electric grid feels it. In soaring temperatures, homes and businesses rely more heavily on air-conditioning - and that surge in electricity use puts extra strain on equipment.

Transformers, which safely step voltage down for everyday use, are especially impacted during hot spells, when they don't have time to cool off.

To be ready for those moments, SCE technicians inspect, repair and test used transformers, so they're available when demand spikes or outages occur - without relying solely on brand-new equipment.

Whenever a transformer in the field is replaced, the old one is sent to SCE's Distribution Apparatus Shop to determine whether it should be retired or can be given a second life. The shop helps prevent used equipment from being sent to the landfill when it can be repaired instead.

Read the full story on ENERGIZED.

Outage Management to Deliver Reliable Power

SCE understands that power outages can contribute to hardship, whether they are due to emergencies like severe weather or planned maintenance and modernization projects. The goal is

to keep customers informed and minimize the impact of

these outages. SCE's website features a live outage tracker with real-time updates from SCE's field crews via the Customer Crew Connect app. In 2025, SCE continued enhancing its communication capability to provide customers with timely notifications and support customers in making necessary arrangements. SCE also introduced an automatic enrollment system for outage alerts and updated its messaging to be more customer-focused. Additionally, SCE launched a Proactive Community Outreach initiative to improve awareness and understanding of significant outages.

SCE is using data-driven analysis to assist with grid monitoring and shifting to a more proactive response, where possible. Data scientists within Grid Operations create algorithms using smart meter and other data that notify SCE of dozens of different wire-down scenarios, as well as their locations. The Grid Operations team has developed several algorithms to proactively detect the location of issues such as failing equipment and hazards such as overloads due to energy theft. In such cases, SCE dispatches a field technician to troubleshoot the problem. SCE maintains an inventory of spare equipment, including poles, towers and transformers, so field crews can replace damaged infrastructure during extreme weather events quickly.

SCE analyzes unplanned outages and customer impacts to develop asset strategies to reduce probability and duration of outages. This information is also used to support operational decision-making to improve response and restoration times.

Introduction Priority Topics Foundational Topics Appendix 15

Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Eaton Fire: Response, Accountability & Ongoing Commitment

The January 2025 wildfires marked one of the most destructive events in California history. Edison International recognizes the profound impact on the communities SCE serves, including families displaced, homes, lives and businesses lost and lives disrupted. From the outset, our focus has been on supporting those impacted and contributing to recovery with urgency and care.

In the immediate aftermath, Edison International and SCE prioritized public safety, emergency response and service restoration. Crews mobilized to assess damage, stabilize the system and restore power where it was safe to do so, working in close coordination with local authorities and first responders.

These efforts were accompanied by shareholder-funded contributions to community relief and sustained outreach, including more than a dozen workshops and direct engagement with impacted residents.

The investigation into the Eaton fire's origin is complex and ongoing. While SCE has not conclusively determined that its equipment caused the ignition of the Eaton Fire, a viable explanation is that a deenergized, idle SCE transmission facility in the preliminary area of origin was associated with the ignition, and SCE is not aware of evidence pointing to another possible source of ignition of the fire. Absent additional evidence, SCE believes that it is likely that its equipment could have been associated with the ignition of the Eaton Fire.

Throughout this process, SCE has sought to be as transparent as possible while respecting legal requirements. Based on the information it has reviewed, SCE believes that it will be able to make a good-faith showing that its conduct, with respect to its transmission facilities in the Eaton Canyon area, was consistent with the actions of a reasonable utility. At the same time,

January 2025 Wildfires: Building Back Stronger

To support rebuilding efforts following the Eaton and Palisades fires in January 2025, SCE replaced nearly 1,950 poles and approximately 750 transformers. In addition, SCE has committed to undergrounding

155 miles of electrical distribution infrastructure, with approximately 30 miles of distribution circuits in and adjacent to the Eaton (~5 miles) and Palisades (~25 miles) burn scar areas completed as of May 2026.

Edison International supported community recovery through $6.3 million in shareholder-funded charitable contributions in 2025, delivered through corporate contributions and the Edison International Foundation, with additional support in 2026 as rebuilding needs evolve.

Both the charitable contributions and the Wildfire Recovery Compensation Program are designed to help those affected rebuild more quickly. These actions represent Edison International's continued commitment to public safety, infrastructure resilience and affordability as climate-driven wildfire risks intensify.

SCE continues to prioritize recovery for impacted community members.

This event reinforced the importance of continuous learning and improvement. Within weeks of the fire, SCE strengthened its policies regarding transmission operations and maintenance, including enhanced grounding practices for idle transmission lines, and expanded inspection protocols. These insights are being shared with regulators, industry peers and utility forums to support broader learning as climate-driven wildfire

risks intensify.

Supporting recovery remains a central priority. SCE established the Wildfire Recovery Compensation Program to provide an expedited path for eligible claimants to seek resolution of their claims. Informed by input from more than 1,200 community members and designed with guidance from Kenneth R. Feinberg and Camille S. Biros, world leaders in compensation fund design, the program emphasizes clarity, fairness and speed. As of May 21, 2026, more than 3,400 claims had been submitted, consisting of about 10,200 individuals, trusts and legal entities. More than 1,750 offers had been extended to over 4,300 claimants, totaling nearly $600 million. Payments totaling nearly $175 million had been made to more than 1,200 claimants, with additional payments in process. Submitting a claim takes, on average, less than two hours, and more than 70% of offers extended have been accepted, with additional decisions pending.

Looking ahead, Edison International and SCE remain focused on long-term recovery, accountability and strengthening resilience in the communities they serve.

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Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Wildfire Risk Management

Wildfires in Southern California underscore the importance of SCE's Wildfire Mitigation Plan and the need for continuous improvement in infrastructure resilience. While wildfire risk cannot be eliminated, SCE continues to invest in measures designed to reduce risk and protect public safety.

SCE's Wildfire Mitigation Plan (WMP)

A Bird's-Eye View of Wildfire Safety

Some wildfire risks are easier to spot from above. Using drones equipped with high-resolution cameras, SCE inspectors can get a clearer view

of power lines and other electrical equipment. From the air, they can spot animal nests, damaged hardware and other potential issues that may need repair or replacements.

Every year, SCE completes about 450,000 structure inspections - more than half of which target HFRAs - as part of the WMP. By flagging potential problems sooner, these bird's-eye inspections help reduce wildfire risk and strengthen the grid to keep communities safe.

Read the full story on ENERGIZED.

SCE submits its WMP to the Office of Energy Infrastructure Safety (OEIS). The WMP outlines SCE's mitigation strategies and activities to enhance grid resilience and reduce wildfire risks.

The 2026-2028 WMP was filed on May 16, 2025, and approved by OEIS on Feb. 23, 2026. Following approval of the WMP, SCE maintains ongoing reporting, with regulatory oversight provided by OEIS.

2025 wildfire mitigation accomplishments include:

• Hardened Infrastructure: In 2025, SCE installed more than 700 circuit miles of covered conductor, bringing cumulative hardening to approximately 7,100 circuit miles.1

• Vegetation Management: SCE inspected approximately

  1.6 million trees, including more than 800,000 in HFRAs. SCE performed trims and removals on more than 300,000 trees and inspected and/or brushed over 200,000 structures

  in HFRAs.

• HFRA Inspections: SCE completed nearly 231,000 ground and 229,000 aerial distribution inspections, along with 34,000 ground and 34,000 aerial transmission inspections.

• Situational Awareness: SCE installed 202 additional weather stations in 2025, bringing the total to approximately 2,000. Observations from this network train machine learning models to develop accurate weather forecasts. These models support more precise targeting of PSPS events, helping reduce the number of customers affected and the duration of de-energizations when PSPS is necessary for public safety.

In 2025, SCE met or exceeded nearly all wildfire mitigation goals. SCE's risk reduction is driven by physical mitigations including covered conductor, vegetation management, risk-informed equipment inspections and situational awareness capabilities such as weather stations and wildfire HD cameras.

1 For additional information, see Edison International Business Update, February 2026.

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Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Near-Term Actions

SCE continues to make deliberate, risk-informed investments to adapt its system to the threat of climate-driven wildfires. The January 2025 wildfires highlighted the increasing frequency and severity of wildfire events and their impacts on communities.

Over the past decade, California's wildfire season has grown longer and more extreme, with 15 of the most destructive fires in state history occurring since 2015.1

Partnership-Driven Collaboration

SCE invested $37 million in costs for the Quick Reaction Force (QRF), a fire suppression program in which SCE partners with local firefighting agencies. The QRF consists of aerial firefighting resources and is the first helitanker with night vision that can refill its tanks while hovering at night, when winds can be lower. QRF is a year-round program.

SCE has advanced its wildfire mitigation capabilities by

Public Safety Power Shutoffs (PSPS)

During extreme fire conditions, which include strong winds, low humidity and dry vegetation, SCE may temporarily shut off power to reduce the risk of a fire caused by utility equipment. PSPS is an important tool to keep communities safe when wildfire risk is high. While power outages create hardship for customers, SCE continues to invest in infrastructure to enhance safety and resilience. In 2025, SCE had 13 PSPS de-energization events, with approximately 540,000 customers deenergized.

California Structures Burned (in Thousands)

2.9

15 of the 20 most destructive fires in California history have occurred since 2015.

3.8

37.0

18.6

collaborating with universities including:

• San Jose State University: Continuing membership with the Wildfire Interdisciplinary Research Center, supporting projects for possible future operational use, including analyzing fuel moisture across the U.S., studying Wildland-Urban Interface fire exposure from near-home combustibles and developing a wildfire data exchange platform.

• University of California, Santa Barbara: Continuing

  When using PSPS, SCE conducts community outreach to help customers and public safety partners prepare for PSPS and other outages. SCE actively engages customers, particularly those with access and functional needs. Community Resource Centers and Community Crew Vehicles are available to support customers in areas impacted by PSPS. SCE maintains an interactive map of outages, including PSPS, on its website and notifies customers up to three days ahead of a potential PSPS,

  1.0

  1.7 2.0

  partnership to develop and evaluate situational awareness capabilities, including an AI-based weather forecast model

  when possible.

  SCE also provides relief through free portable backup batteries

  1991-95 1996-2000 2001-05 2006-10 2011-15 2016-20 2021-25

  Following the Governor of California's March 2025 emergency proclamations and executive orders, California Coastal Act permitting requirements were temporarily suspended for certain wildfire recovery and mitigation activities. Certain California Environmental Protection Agency and California Natural Resources Agency requirements were also suspended. These actions have allowed SCE to accelerate undergrounding, certain vegetation management activities and rebuilding of electric infrastructure in eligible areas while supporting community recovery and long-term wildfire risk reduction and maintaining environmental safeguards.

  SCE is hardening the grid to promote safety, grid resilience and system readiness for growing climate-change impacts and is working with partners to expand and enhance readiness measures.

  system aligned with current forecast science.

• University of Colorado, Boulder: Collaborating to analyze the Vegetation Build-Up Index, which contains remote-sensing data.

By recognizing that wildfires, regardless of ignition source, pose a significant threat to public safety and electric infrastructure, SCE is actively involved with the Edison Electric Institute (EEI) Wildfire Task Force, where SCE President and CEO Steven Powell serves as co-chair. The task force provides a collaborative environment for sharing leading wildfire mitigation practices and expanding partnerships with stakeholders at the community, state and federal levels. The EEI Wildfire Task Force also works closely with regulators, policymakers, rating agencies and investors to ensure that electric companies are well-positioned to continue supporting national and economic energy security.

to power medical equipment for eligible critical care customers. In addition, SCE offers rebates for portable batteries and generators, hotel discounts or vouchers, and support through food banks and related resources for impacted customers with access and functional needs.

1 Data was sourced from the California Department of Forestry and Fire Protection (CAL FIRE), as of April 8, 2026, and is based on information readily available from various sources, and is thus subject to review and change.

Introduction Priority Topics Foundational Topics Appendix 18

Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Climate Adaptation

As SCE communities have experienced firsthand in California, climate impacts are being felt today and are projected to worsen over time. SCE's approach uses the best available climate science to understand how changing exposure may affect assets and operations and to plan for deliberate, risk-informed adaptation.1

With a focus on high-risk areas and vulnerable communities, SCE uses qualitative and quantitative methods to prioritize near- and long-term actions and associated reactive and proactive investments. Adaptation planning at SCE looks across sectors to optimize societal benefits and accelerate risk reduction while managing customer affordability.

Adaptation for Existing Utility Infrastructure

SCE's electricity grid relies on distribution, sub-transmission and transmission assets and communications infrastructure to

bring electricity to approximately 15 million people. In May 2022, SCE filed its first Climate Adaptation Vulnerability Assessment (CAVA), which evaluated the potential near- and long-term impacts of temperature, precipitation, sea level rise, wildfire hazards and cascading events on its existing infrastructure

and operations.2

In May 2026, SCE filed its second CAVA, building on the 2022 assessment. The 2026 CAVA utilized the most up-to-date high-resolution climate projections available to better understand asset vulnerability for four key climate hazards

(extreme heat, wildfire, precipitation-driven inland flooding and coastal flooding) for over 60 asset classes based on climate projections and asset information.

The CAVA exposure and vulnerability analyses apply regional climate change projections to SCE's existing electric system - how it is built, operated and delivers service today. By focusing on the existing system, SCE can identify and prioritize where adaptations may be necessary to enhance resilience for assets built and designed under historical climate conditions and where future investments, practices and plans should be proactively climate-informed.

In the near term (~2030), the 2026 CAVA identified a limited set of prioritized vulnerabilities related to temperature and inland and coastal flooding. Rising temperatures are projected to stress electrical equipment and may challenge outdoor work practices. Localized flooding vulnerabilities may damage low-lying electrical and communications assets and contribute to overhead asset (e.g., pole) failure. Sea level rise is projected to impact SCE infrastructure on Catalina Island and electric assets in Long Beach and other coastal areas. Near-term wildfire vulnerabilities are managed through the WMP and were not studied in the CAVA.

At mid-century (~2050), the 2026 CAVA uncovered broader climate exposure, including more electrical and communications assets prioritized for temperature impacts and growing frequency of weather and fuel conditions conducive to wildfire, which may increasingly stress assets primarily in coastal areas as well as the Catalina Island water system. Additional sites also show exposure to inland and coastal flooding.

Based on the 2026 CAVA, SCE expects to propose climate-driven investment in its 2029 General Rate Case (GRC) to address future risks. Specifically, CAVA results will be integrated into asset prioritization to support proposed investments such as reducing temperature-related stress on electrical equipment, additional wildfire hardening, protecting assets susceptible to precipitation

and reinforcing the existing seawall at the beachfront of Pebbly Beach Generation Station on Catalina Island to prevent

coastal flooding.

Building on the findings of the 2026 CAVA, Edison International is preparing a white paper that will summarize how climate change will impact SCE's electric system and the communities it serves. The paper will frame these insights in the context of SCE's current and planned adaptation efforts and underscore the importance of coordinated, cross-sector solutions to strengthen community resilience.

1 Extreme heat events and rising average temperatures lead to increased electricity demand as well as cause stress to the grid and may result in blackouts and/or equipment damage. Higher temperatures, changing precipitation patterns and extreme wind events have already led to more frequent and intense wildfire conditions, as well as proactive PSPS events. Increasing variability in precipitation has led to heavier than normal precipitation events, including flooding and associated mudslides across Southern California. Rising seas have already resulted in king tide events leading to flooding and dangerous conditions in low-lying regions.

2 Defined by the CPUC (D. 20-08-046, p. 119) as communities in the 25% highest-scoring census tracts according to the most recent version of the California Communities Environmental Health Screening Tool (CalEnviroScreen), as well as all California tribal lands, census tracts with median household incomes less than 60% of state median income and census tracts that score in the highest 5% of Pollution Burden within CalEnviroScreen but do not receive an overall CalEnviroScreen score due to unreliable public health and socioeconomic data.

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Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Evolving Climate Science

To align with the most up-to-date guidance and improve the actionability of CAVA results, SCE has expanded its climate science capabilities and applications. Before the 2026 CAVA filing, SCE engaged with the climate science research community and the CPUC to ensure that studies continue to be based on the best available climate science. Following the updated CPUC guidance, the 2026 CAVA relied on data developed for the California Fifth Climate Change Assessment, which relies on numerical representations of the Earth System that simulate physical processes and their interactions between the atmosphere, ocean, land and cryosphere. These models are used to run simulations to explore potential future climate conditions. The Coupled Model Intercomparison Project (CMIP) brings together many different models and runs them under a suite of potential emission scenarios to inform the Intergovernmental Panel on Climate Change (IPCC) reports.

Because global climate models are too coarse for regional planning, the California Climate Change Assessments work with research institutions to downscale the CMIP simulations. The Fifth Assessment used 16 unique global climate models to downscale 137 simulations using two techniques: a dynamical approach that relies on physical equations, and a statistical approach that relies on established relationships. These downscaled simulations were used to analyze how SCE's service area could change under different global warming levels (GWLs).

The GWL approach enables SCE to use more climate simulations to study potential regional impacts. The warming scenarios are defined by the IPCC as the global change in average temperature relative to preindustrial levels (1850-1900). Following the updated IPCC and CPUC guidance, SCE used 0.8°C and 1.0°C of global warming as historical baselines and 1.5°C and 2.0°C as near-term and mid-century future warming scenarios.

Following a moderate-high emission scenario (Shared Socioeconomic Pathways 3-7.0), these global warming levels are reached around 2000 (0.8°C), 2020 (1.0°C), 2030 (1.5°C) and 2050

Power Line Temperature Checks Help Prevent Wildfires

Similar to how doctors use thermometers to detect fevers before symptoms appear, SCE uses a

technology called distribution infrared scanning (DIRS) to take proactive temperature checks of its electric equipment. Each summer, field personnel use thermal cameras to scan about 5,300 miles of circuits in HFRAs, looking for equipment running hotter than it should.

Those early warning signs help diagnose the equipment's condition, so crews can fix spots that might otherwise overheat, warp, disconnect or potentially ignite a fire. In 2025, SCE exceeded its annual inspections target by 300 miles of additional circuits. Line crews have conducted over 300 repairs based on DIRS findings in the past four years, with around 50 of those repairs being conducted in 2025.

Read the full story on ENERGIZED.

(2.0°C). Using the GWL approach enables SCE to utilize more projection simulations to understand how different regions could respond to a global warming scenario.1

SCE actively works with the California climate science community and internal experts to develop and enhance tools that better integrate climate projections into utility planning and vulnerability assessments. More information on these models and methods can be found in SCE's 2026 CAVA.

Proactive Adaptation

Electric grid design standards and planning practices used at SCE and throughout the industry are based on historical weather data, which can underestimate future conditions and associated risks. Future climate projections must be incorporated into planning processes related to long-lived assets and systems to appropriately address chronic and acute climate risks.

SCE has continued this work by focusing on planning processes that inform grid planning and investment decisions for long-lived assets, including load forecasting conducted in partnership with the California Energy Commission (CEC) to inform its 2024 Integrated Energy Policy Report, as well as the Integrated Resource Plan (IRP) process and distribution planning processes. These processes are now informed by forward-looking temperature projections to size investments for future

climate conditions.

1. CPUC D.24-08-005, "Phase 2 Decision Updating Climate Change Adaptation Modeling Requirements and Refining the Climate Adaptation and Vulnerability Assessments." Aug. 1, 2024. R.18-04-019.

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Building & Maintaining a Reliable, Resilient & Ready Grid Leading an Affordable Clean Energy Transition Customers, Communities & Stakeholder Engagement Safety, Cybersecurity & Workforce Strategy

Empowering Communities: Building a Resilient Future Together

Edison International supports communities to adapt to climate change, building a resilient future together.

Climate Resolve's Ready for Tomorrow program connects Disadvantaged Communities (DACs) and DVCs in Southern California to climate planning research, funding and resources.

Since 2018, Edison International has supported this no-cost grant writing assistance program as it expanded from Los Angeles County to the Inland Empire and throughout SCE's service area. Ready for Tomorrow has helped DACs and DVCs secure more than $28 million in grant awards.

The impact is significant: For every dollar invested, DACs and DVCs secure nearly $100 in grant funding.

These grants fund projects such as tree planting, bike lanes, zero-emission buses, workforce development and climate preparedness for extreme heat, wildfire, drought and energy resilience - strengthening public safety and helping vulnerable communities address climate risks.

Community Resilience

SCE launched the second Climate Resilience Leadership Group (CRLG) in 2025 to support the 2026 CAVA filing. The CRLG is an SCE-created forum consisting of community leaders operating in CPUC-designated DVCs1 and other at-risk populations in SCE's service area. CRLG members work closely with SCE to co-develop engagement materials and surveys around climate adaptation and collect feedback about community resilience to

climate-driven power outages. The 2025-2026 CRLG cohort serves over 100 Tribal and non-Tribal communities.

SCE expanded engagement by identifying partners in new regions of its service area and collecting feedback from hard-to-reach populations such as small businesses, seniors and access and functional needs customers.

In addition to sharing co-designed engagement materials, some CRLG partners created their own collateral to share with

communities, signaling growing adaptation capacity within CRLG organizations. CRLG members also collected survey data that helped ground-truth SCE's Community Resilience Metric (CRM), which quantitatively measures community resilience to

power outages.2

Overall, the 2025-2026 CRLG cohort collected more than 1,800 complete surveys across 320 ZIP codes in SCE's service area - more than twice as many as prior engagement efforts. Survey scores related to outage preparedness were compared to

SCE-generated CRM scores. SCE found that self-rated resilience and CRM scores aligned closely, indicating that CRM is a robust estimate of community resilience. Surveys collected by the CRLG also provided insight into which outage impacts are most important to community members.

1. Disadvantaged Vulnerable Communities are defined by the CPUC.

2. CPUC D.20-08-46, "Decision on Energy Utility Climate Change Vulnerability Assessments and Climate Adaptation in Disadvantaged Communities (Phase 1, Topics 4 and 5)." Sept. 3, 2020. R.18-04-019.