To reduce the risk of wildfires, PG&E shuts off power during extreme weather conditions, such as when the forecast calls for sustained winds above 20 mph and wind gusts above 30 to 40 mph.
According to forecasting published by PG&E Mendocino, Sonoma, and Lake Counties could face a PSPS starting Tuesday. Those counties as well as Humboldt, Trinity, Shasta, and other Northern California Counties could see their power cut on Wednesday night.