Hundreds of customers are also without power in Alameda, Contra Costa and Santa Clara counties.
JD Guidi, a PG&E representative, told KQED that the utility has shut down electricity for 15,000 customers throughout its entire California service area.
It’s possible the utility could still turn the power off for an additional 5,000 customers, although some who had their power cut could get it restored later Friday. Find details about the location of these outages on KQED’s map.
The utility said it is standing up dozens of community centers to provide support for customers, including “ADA-accessible restrooms, device charging, Wi-Fi, blankets, air conditioning, bottled water and snacks, and more.”
You can find a list of locations organized by county on PG&E’s website.
“The duration and extent of power outages will depend on the weather in each area, and not all customers will be affected for the entire period,” the company said in a statement.
The preventive power shutoffs come as the National Weather Service has issued a red flag warning for nearly the entire Bay Area through Saturday afternoon.
The agency said relative humidity dropped overnight in the North Bay and East Bay.
Several weather stations reported winds as high as 50 mph, meteorologists said. The strongest gust was detected at Mount St. Helena at 75 mph.