The lights were back on Friday for more than half of the nearly 2 million Northern California residents who lost electricity after the Pacific Gas and Electric Co. utility switched it off earlier this week to prevent its equipment from sparking wildfires during dry, windy weather.
But the threat of widespread outages loomed in Southern California after the winds moved to the Los Angeles area, where a wildfire fueled by strong Santa Ana winds prompted officials to order the evacuation of 100,000 people from their homes in foothills of the San Fernando Valley on the northern edge of Los Angeles County.
PG&E restored the power in Northern California after workers inspected power lines to make sure it was safe to do so. The winds had increased the possibility of transmission lines toppling to the ground and starting wildfires.
The utility said 426,000 Northern California businesses and residences got their power back — but that 312,000 customers were still in the dark. About half of those who lost power in the San Francisco Bay Area had it again on Friday. The city itself was not subject to the preventive outages. Experts have said there are between two and three people for every electrical customer.
Some people in the largely rural Butte, Plumas and Yuba counties and in the wine country counties were in 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. In Napa and Sonoma, north of San Francisco, the outages started on the two-year anniversary of deadly wildfires that killed 44 and destroyed thousands of homes.
PG&E crews were inspecting thousands of miles of power lines before they can be re-energized and reaching them in remote areas can be more challenging, prolonging the outages, said Jeff Smith, a PG&E spokesman.
"We understand that our customers are frustrated, particularly customers who have been without power for several days, but the inspection process in remote areas can be a little more challenging," he said.
PG&E faced hostility and second-guessing over the shut-offs, which prompted runs on supplies like coolers and generators and forced institutions to shut down. The University of California, Berkeley, on Friday was closed for classes for the third day in a row. Also hit hard by the outages was California's famed wine country area just north of San Francisco.
PG&E cast the blackouts as a matter of public safety, aimed at preventing the kind of blazes that have killed scores of people over the past couple of years, destroyed thousands of homes, and ran up tens of billions of dollars in claims that drove the company into bankruptcy.
The utility suggested it was already seeing the wisdom of its decision borne out as gusts topping 77 mph (122 kph) raked some hilltops where wildfire risk was extremely high.
"We have found multiple cases of damage or hazards" caused by heavy winds, including fallen branches that came in contact with overhead lines, said Sumeet Singh, a vice president for the utility. "If they were energized, they could've ignited."
Utility CEO Bill Johnson promised if future wind events require similar shut-offs, the utility will "do better" when it comes to communicating with customers. It's unacceptable that its websites crashed, maps were inconsistent and call centers were overloaded, Johnson said.
"We were not adequately prepared," he said.