A severe wind event beginning Saturday night will lead Pacific Gas and Electric to turn off power to nearly 400,000 Bay Area customers in eight counties to reduce the risk of wind-damaged equipment sparking wildfires. It was originally estimated that 850,000 customers would be impacted in the greater Northern California area, but that estimate rose to 940,000 Saturday morning.

PG&E said Saturday that power outages would occur in in Alameda, Contra Costa, Marin, Napa, San Mateo, Santa Clara Solano and Sonoma counties beginning at around 4 p.m. Click here for the full six-phase plan. The outage maps show much of the Bay Area in the dark (find maps here).