What caused California’s lethal wildfires?

More than 30 are dead and 400 missing in deadliest week of wildfires in state’s history

Fire destroys a home in the Napa wine region of California
Fire destroys a home in the Napa wine region of California
(Image credit: JOSH EDELSON/AFP/Getty Images)

Questions are being raised about the cause of the deadliest week of wildfires in California’s history - and whether authorities did enough to warn vulnerable residents as the flames edged closer to populated areas.

The cause of the blazes - the biggest of which are in Northern California’s Sonoma, Napa and Mendocino counties - remains unclear.

Subscribe to The Week

Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

SUBSCRIBE & SAVE
https://cdn.mos.cms.futurecdn.net/flexiimages/jacafc5zvs1692883516.jpg

Sign up for The Week's Free Newsletters

From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.

From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.

Sign up

Mike Mohler, a Cal Fire battalion chief, said investigators are looking into reports of downed power lines to determine whether they caused some of the wildfires, which now number almost two dozen.

High-speed winds may have helped spread the fires, says CNN. Hurricane-force gusts have been reported in Sonoma County.

The dry conditions and proliferation of dried vegetation are also thought to have contributed to an almost “perfect storm” of factors that have fanned the infernos.

The three largest fires started between 9pm and 11pm on Sunday, “ripping into neighborhoods when many residents had started to go to bed”, says CNN.

There have been claims that authorities failed to give residents adequate warning.

In Sonoma County, police called residents’ landlines advising them to evacuate, and sent alerts through a voluntary text-message system. But only about 10,500 of the county’s 500,000 residents had signed up for alerts as of June, says The Washington Post.

More dry and gusty winds have been forecast, threatening to further fan the flames over the weekend. Chris Canning, the mayor of Calistoga, in the Napa Valley, told residents and visitors to evacuate and stay away, ABC News reports.

“Your choice to stay, and there have been very few of them, is a distraction to our first responders,” Canning said. “You will not be given life safety support at this point. You are on your own.”

Explore More