More than 20,000 PG&E customers are currently without power as the utility company starts its Public Safety Power Shutoffs across several regions of the San Francisco Bay Area early Wednesday morning.

The shut downs have left 20,059 PG&E customers in the nine-county Bay Area powerless in Marin, Napa, Solano and Sonoma counties early Wednesday, with the most customers affected currently in the Fairfield and Vacaville city areas, according to PG&E's outage website.

The first outages started in Fairfield at 12:09 a.m., PG&E officials said, and a total of 14,520 customers in the Fairfield/Vacaville areas are without power as of 1 a.m. The majority of the outages are in central to north Fairfield, with some outages extending into south Vacaville.

The city of Sonoma is the next hardest hit, with 3,421 customers without power near the downtown area and an area extending a few miles north on the state Highway 12 corridor starting around 12:29 a.m., per the PG&E outage website.

In Napa County, 131 customers are without power due to the shutdown in a rural area just west of unincorporated Yountville and Oakville.

In an outage unrelated to the power shutdown, approximately 3,748 PG&E customers are without power in or near the west of the city of Napa. PG&E is investigating the cause of that outage.

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