Firefighters and aircraft from 10 states began arriving in California on Friday to help weary crews battling some of the largest blazes in state history as weekend weather threatened to renew the advance of flames that have killed six people and incinerated hundreds of homes.
Some 560 wildfires were burning throughout the state, but many were small and remote.
The bulk of the damage came from three clusters of blazes that were ravaging forest and rural areas in the wine country and San Francisco Bay Area.
Those complexes, consisting of dozens of fires, exploded in size on Friday. Together, they had scorched 991 square miles and destroyed more than 500 homes and other buildings, fire officials said.
At least 100,000 people were under evacuation orders.
Two Bay Area clusters, the LNU Lightning Complex and the SCU Lightning Complex, became respectively the second- and third-largest wildfires in recent state history by size, according to Cal Fire records.
The third blaze, the CZU Lightning Complex, is in San Mateo and Santa Cruz counties.
The fires were sparked by lightning earlier in the week.
Cooler, more humid weather overnight helped firefighters gain ground against the fires, but the National Weather Service issued a fire weather watch from Sunday morning into Tuesday for the entire Bay Area and central coast.
Forecasters said there was a chance of thunderstorms bringing more lightning and erratic gusts.
More than 12,000 personnel were fighting fires around the state, aided by fleets of helicopters and other aircraft. By Friday, the state’s fire agency, Cal Fire, had called out 96 percent of its available fire engines.
But reinforcements began to arrive.
The number of personnel assigned to the LNU complex north of San Francisco more than doubled from 580 to over 1,400 on Friday and nearly 200 fire engines were on the scene, fire officials said.
“I’m happy to see the jumps that we’ve had today,” Cal Fire incident commander Sean Kavanaugh said.
That could help crews make further progress against the sprawling fire, which was just 15 percent contained.
“I feel like we’re up on our feet, standing straight and actually moving a little bit forward,” Kavanaugh said Friday night.
However, the number of large fires was “staggering” and had put “tremendous strain” on firefighting resources throughout the Western states, he said.
Nevada and Arizona, for example, have battled sizable blazes this week as a heat wave swept the West.
Gov. Gavin Newsom said 10 states were sending personnel and equipment. The governor also said he was reaching out to Canada and Australia for help.
“We have more people but it’s not enough,” Newsom said.
In the Santa Cruz mountains south of San Francisco, about 1,000 firefighters were battling a fire 10 times the size they typically would cover, according to Dan Olsen, a Cal Fire spokesman.
With firefighting resources tight, homes in remote places burned unattended.
Cal Fire Chief Mark Brunton pleaded with residents to stop battling fires on their own, saying that only causes more problems for professional firefighters.
“We had last night three separate rescues that pulled our vital, very few resources away,” he said.
But Peter Koleckai credits a neighbor, not firefighters, with saving his home in a rural area where dozens of homes were reduced to smoldering ruins.
“We were here at about 3 o’clock in the morning and the fire department just left. They just left,” he said.
Koleckai said he ran to a firefighter and told him a brush fire was erupting next to a house.
“They never went up there and it engulfed the whole house, took the house out,” he said.
A neighbor with a high pressure hose, firefighting equipment and a generator saved his home, Koleckai said.
Cal Fire Battalion Chief Mike Smith said typically a wildfire of the size burning through the region would have 10 or even 20 times as many firefighters.
“We are doing absolutely everything we can,” he said.
The death toll from California fires has reached at least six. Three bodies were found Thursday in a burned home in Napa County.
A man also died in neighboring Solano County, and a Pacific Gas & Electric utility worker was found dead Wednesday in a vehicle in the Vacaville area.
Also Wednesday, a helicopter pilot died in a crash while dropping water on a blaze in Fresno County.
Smoke and ash billowing from the fires has fouled the air throughout the San Francisco Bay Area and along California’s central coast.
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