The National Weather Service says west winds of 20 to 30 mph could pack gusts of up to 65 mph.
Utilities are securing additional crews. Heavy rain and strong winds were expected from Wednesday night into Thursday.
The fire that started Thursday night burned nearly 8, 400 acres, destroyed 17 structures and damaged dozens more. One man died of a heart attack during the fire in the Porter Ranch neighborhood, officials said.
The CPUC is holding an emergency meeting Thursday, and is requiring members of PG&E's board, C-suite and vice presidents to attend
Experts say it's hard to know what might have happened had the power stayed on, or if the utility's proactive shutoffs are to thank for California's mild fire season this year.
Areas without power includes Plumas, Yuba and Butte counties, where people are on their third day without electricity. Butte County is where a fire started by PG&E equipment last year decimated the town of Paradise and killed 85 people.
The report says that created significant additional stress on 13 more poles to the south and 11 poles to the north and caused them to fall as well.
The unpopular move by Pacific Gas and Electric that disrupted daily life was prompted by weather forecasts creating extreme wildfire danger and came after catastrophic fires sent the utility into bankruptcy and forced it to take more aggressive steps to prevent blazes. The city of San Francisco itself is not in the power cutoff zone.