When does SCE turn off power for a PSPS?

During dangerous fire weather conditions, when strong winds, dry vegetation and low humidity are forecast, we start considering a PSPS. Under these conditions, a fire could spread rapidly, posing a significant safety risk. PSPS reduces the risk of utility equipment starting a fire when winds blow branches or other debris into power lines.  

PSPS decisions are based on real-time weather reports from pole-top weather stations on or adjacent to PSPS circuits. We primarily consider these factors and conditions when deenergizing a circuit or circuit segment:  

• Strong winds
• Low humidity
• Dry vegetation that could serve as fuel