SAN FRANCISCO — Pacific Gas & Electric Co. was set to begin shutting off power Wednesday to some 375,000 people in 18 Northern and central California counties as the region faces extreme fire weather that’s lasted since October.

“This lack of rain is keeping the threat of fire very real, this late in the season, in many areas.” — Scott Strenfel, PG&E’s principal meteorologist

A virtually rainless fall has left brush bone-dry and forecasts called for low humidity and winds gusting at times to 55 mph, which might fling tree branches or other debris into power lines, causing sparks that could set catastrophic fires in the region, PG&E officials said.

One Napa County reporting station hasn’t seen a measurable drop of rain since mid-September — the first time that’s happened since 1905, said Scott Strenfel, PG&E’s principal meteorologist.

The northern Sierra Nevada has seen a fraction of an inch of rain in the past two months instead of the usual 5 inches, he said.

“This lack of rain is keeping the threat of fire very real, this late in the season, in many areas,” said Scott Strenfel, PG&E’s principal meteorologist.

Ironically, the dry weather up north came as Southern California battened the hatches for a brief but fierce bout of rain. A storm system dumped about 2 inches of rain in the San Diego County area on Tuesday and more was expected Wednesday.

Flash flood watches were in effect for some communities east of Los Angeles, with storm warnings up for mountain communities.

Voluntary evacuation warnings were issued for a few communities in an area of Orange and Riverside counties that was burned in a wildfire last year.

The Weather Should Ease by Thursday Morning

In the north, however, warnings of extreme fire danger covered a large area.

California’s state fire agency placed fire engines and crews in position in some counties and had crews ready to staff aircraft and bulldozers.

The planned blackouts will affect counties north of Sacramento, in the northern San Francisco Bay Area, the wine country and Sierra Nevada foothills.

The weather should ease by Thursday morning, allowing PG&E to begin restoring power, said Mark Quinlan, PG&E’s senior director of emergency preparedness and response.

The state’s largest utility decreased the number of people who could be affected from an original estimate of about 660,000 based on updated forecasts and some juggling of its power system. The utility said it will closely monitor the weather and could further reduce that number if it improves.

The planned blackout would be the latest in a series of massive outages by the country’s largest utility, including one last month that affected nearly 2.5 million people and outraged local officials and customers who accused the utility of overkill and using blackouts as a crutch because it failed to harden its equipment to withstand fire weather.

The outages have been “terribly disruptive” and PG&E is taking steps to avoid them in the future but at the moment, “we won’t roll the dice on public safety,” company CEO Andy Vesey said.

Meanwhile, California’s utilities regulators are demanding answers from wireless providers whose equipment failed during the power outages, leaving hundreds of thousands of people without a way to get emergency alerts or make 911 calls.

FILE – In this Oct. 31, 2019, file photo, smoke from the Maria Fire billows above Santa Paula, Calif. California regulators are voting Wednesday, Nov. 13, on whether to open an investigation into pre-emptive power outages that blacked out large parts of the state for much of October as strong winds sparked fears of wildfires. The state’s largest utility, Pacific Gas & Electric Co., initiated multiple rounds of shut-offs that plunged nearly 2.5 million people into darkness throughout northern and central California. (AP Photo/Noah Berger, File)

PG&E Initiated Four Rounds of Planned Outages in October

The California Public Utilities Commission holds a public hearing Wednesday with executives from AT&T, Comcast/Xfinity, T-Mobile and others.

In a letter calling for the meeting, CPUC President Marybel Batjer said that “lack of service is not a mere inconvenience— it endangers lives.” She said residents do not have the luxury of failed internet or cellphone connections during a wildfire or other disaster.

More than 450,000 people were without communication, according to a group representing rural counties in California. About half of Marin County’s cell sites were out of service.

PG&E initiated four rounds of planned outages in October.

More than 450,000 people were without communication, according to a group representing rural counties in California. About half of Marin County’s cell sites were out of service.

Consumer advocates are urging the PUC to establish backup power requirements and make the companies provide detailed information about the location of outages.

The California Governor’s Office of Emergency Services said in an Oct. 26 letter to communications companies that their level of engagement was “unacceptable” at a time when redundant infrastructure is necessary.

The utilities commission is frustrated with both communications and utilities companies, saying they failed to share detailed information in real time.

Businesses and residents also have complained of poor communications and say that the outages were overly broad and carried out thoughtlessly.

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