The Bay Area shutoffs will affect major cities including Oakland, San Jose and Berkeley, which warned residents especially in hillside neighborhoods to prepare for six days without power.
Windy conditions are expected to last through midday Thursday.
Residents who rely on a private well or private pumping system for water might have interrupted service during the outage, according to the city's email.
Southern California Edison said it's considering cutting power to more than 100,000 customers in eight counties.
California's largest utility says as many as 2 million people will remain without power at least through Thursday.
We have not yet received confirmation on the estimated duration of the power outage.
"OES is urging residents to prepare just like they would for any other events", Miracle said. We'll update with more information throughout the day as the impacts of the blackout become clear.
To protect public safety, PG&E may turn off your power overnight.
· Continue to monitor PG&E's new weather forecasting web page at pge.com/weather which is a dedicated page with weather forecasting information and a daily 7-day PSPS lookahead. To view a list of your impacted locations visit pgepsps.com. This means doing regular safety checks and being sure you have enough fuel to last a few days.
"This is shaping up to be one of the most severe dry-wind events we've seen in our territory in recent years, and we want our customers to be prepared for an extended outage that may last several days", Michael Lewis, senior vice president for PG&E Electric Operations, said in a statement. Parts of almost 30 counties in Northern and Central California that are serviced by PG&E could be impacted.
"The safety of our customers and the communities we serve is our most important responsibility, which is why PG&E has chose to turn power off to customers during this widespread, severe wind event", said Michael Lewis, PG&E's senior vice president of Electric Operations. The potentially affected areas does include Kern County. The shutdown could impact parts of Humboldt County within the next 24 hours.
PG&E said it was informing customers by text and email about where and when the power would be cut. A second group of about 234,000 customers was to lose power starting at noon, the utility said, followed by a third group the utility was still deciding on.
PG&E on Tuesday afternoon introduced an unprecedented energy shutdown to nearly 800,000 clients, together with 278,000 within the Bay Space, beneath a brand new program supposed to stop catastrophic wildfires within the wake of lethal blazes linked to its gear. OES is now operating the Emergency Operations Center (EOC) and is actively coordinating with our operational area response partners and monitoring the situation.
To help mitigate the inconveniences, PG&E has set up "Community Resource Centers," where people without power can access restrooms, bottled water, electronic-device charging and seating in climate-controlled conditions. Adult Protective Services staff are working on contingency plans to protect the most vulnerable. Hospitals have backup generators and could stay open, along with all emergency services.
"It's an unprecedented weather pattern we're seeing coming through the state", said Katie Allen, a local PG&E spokeswoman.