Why PSPS events occur
Cause of PSPS events
Wildfire conditions across California have intensified due to increased temperatures and dryness. The combination of dry vegetation and high winds can uproot trees, blow branches onto power lines or create sparks if power lines contact one another. These conditions call for Public Safety Power Shutoffs (PSPS). PSPS outages occur across the state to prevent wildfires and keep communities safe.
How a PSPS is determined
We monitor the below weather factors to decide whether a PSPS is needed to keep communities safe. Although you may not live or work in a high fire-threat area or an area experiencing high winds, your power may be shut off if your community relies on a line that runs through an area that does.
Low humidity levels
Low humidity levels generally 30% and below
Forecasted high winds above 20 mph and gusts above 30-40 mph
Condition of dry material on the ground and vegetation near lines
Red Flag Warning
A Red Flag Warning issued by the National Weather Service
On-the-ground, real-time observations
Our decision-making process is evolving to also account for the presence of trees tall enough to strike power lines when determining if a PSPS is necessary
Weather and outage information for your area
We created tools so you can see if your area may be impacted by a PSPS.
View a seven-day PSPS forecast by geographic zone. Find out whether your zone is at an elevated, PSPS Watch or PSPS Warning risk.
View current weather, including humidity, precipitation, temperature, wind speeds, wind gusts and Red Flag Warnings.
Report and view current outages by area and look up address specific outage information.
To report or view current outages, visit our outages map.
The California Public Utilities Commission (CPUC) has categorized regions according to their wildfire risk. Homes and businesses with power lines in elevated (Tier 2) or extreme (Tier 3) wildfire risk areas have a higher chance of being affected by a PSPS. An entire power line may need to be shut off if fire conditions affect any portion of the line.
Tier 3 fire-threat areas depict areas where there is an extreme risk (including likelihood and potential impacts on people and property) of wildfires.
Tier 2 fire-threat areas depict areas where there is an elevated risk (including likelihood and potential impacts on people and property) of wildfires.
To learn more about high fire-threat areas, visit the CPUC High Fire-Threat District map website.
Find out what we are doing every day to make our system safer and more resilient. Also, learn how we're improving PSPS for our customers and communities.
Find resources to support you during a PSPS, including device charging, bagged ice and Wi-Fi, as well as support for customers with access and functional needs.