Wildfire Mitigation Efforts

After completing inspections on all overhead transmission, distribution and generation equipment located in high fire risk areas in 2019, we continue to annually inspect the highest risk structures identified by our advanced risk models. Ground inspections by field crews and aerial inspections using drones and helicopters are conducted to obtain a 360-degree view of our equipment for any needed maintenance, repair or replacement.

We’re installing new or improved devices and technologies to reduce the likelihood that our electrical system will be the source of ignition. Some of these measures are also part of our concerted efforts to minimize the number of impacted customers during a PSPS. Replacing bare wire with covered conductor, which is wire with protective layers, significantly reduces the possibility of the power line arcing or sparking if contact occurs with an object like a tree branch or metallic balloon. Fast-acting fuses interrupt current more quickly and reduce the risk of ignitions when there is an electrical fault, such as when a tree falls on a power line during high winds.

As of the end of September 2022:

• Covered Conductor: 4,050+ miles installed
• Fast Acting Fuses: 13,700+ fuses installed or replaced
• Continuing to replace power poles in high fire risk areas with fire-resistant composite poles or wood poles with a fire-resistant wrap to reduce the risk of damaged poles during an emergency and allow for quicker power restoration

Monitoring conditions is one of the many ways we can better predict wildfire risks and follow real-time weather conditions. By expanding the number of weather stations installed, we are able to further refine our weather forecasting and modeling capabilities. These enhanced capabilities and additional sectionalizing devices allow for more targeted PSPS events, minimizing the number of people affected.

• Weather Stations: 1,590+ installed
• Wildfire Cameras: 170+ cameras installed

We are increasing our computing power to be able to model the atmosphere at a higher resolution in order to produce more granular weather forecasts for improved PSPS decisions. We are also evaluating fire spread modeling technology, which has the potential to determine impacts to communities from wildfires during extreme weather events.

Learn More About How Weather Impacts PSPS

We’re continuing our efforts to inspect, trim and remove trees to prevent vegetation from coming into contact with electrical equipment and potentially sparking a fire. Tall trees that have the potential to fall into power lines beyond our standard pruning zones are also assessed.

• Inspect 1.5 million trees annually and prune nearly 900,000 of these trees. There are more than 750,000 trees in high fire risk areas.
• Assess hazard trees in high fire risk areas and mitigate them if deemed unsafe.

Learn More About Hazard Trees

We’re providing backup generation and battery solutions to prepare our customers and communities for potential emergencies and outages. These programs and services will help minimize the impact of PSPS, especially for our most vulnerable communities.

• Rebates on portable power stations, generators, and battery storage
• Critical Care Backup Battery program that provides a no-cost backup battery for eligible Medical Baseline customers who rely on medical equipment and live in a high fire risk area
• Resiliency zone sites that provide temporary backup generation for essential services such as pharmacies, grocery stores, and gas stations, in rural communities during PSPS
• Partnered with San Jacinto High School for a microgrid resiliency pilot and targeting a second pilot site at a school in the Rialto Unified School District. Microgrids, or self-contained electric grids, can provide around-the-clock energy for a limited time and can operate while tied to the larger electric system and separated or “islanded” from it.