Multiple California wildfires prompt evacuations, threaten homes

Multiple wildfires burning across California are creating misery for the state's residents as they spur evacuations, threaten homes and spew noxious smoke into the air.

The fight against the Caldor fire burning near South Lake Tahoe [in the Sierra Nevada mountains] took a turn for the worse Sunday, when officials said fire activity was "more aggressive than what was anticipated." The majority of South Lake Tahoe was placed under mandatory evacuation orders Monday.

Strong winds fueled spot fires and flareups that saw gains slip away, as containment of the 177,260-acre [47,450-hectare] fire dropped from 19 per cent on Sunday morning to 14 per cent by Monday morning. More than 20,000 structures are threatened by the fire.

Acreage and containment updates for the Caldor fire were not available from state fire officials Monday night.

"A couple of days ago I really felt we were turning a corner with it," operations section chief Eric Schwab said Sunday, noting that the fire had been creeping eastward at a pace of about half a mile [800 metres] each day.

But Sunday, it "moved about two and a half miles on us, with no sign that it's starting to slow down," he said.

During an emergency operations update Monday, California Department of Forestry and Fire Protection chief Thom Porter said firefighters were starting to get some control on the west side of the fire, where the communities of Sly Park and Grizzly Flats were already heavily damaged.

But they were continuing to struggle on the east side, which is even harder to access. Conditions deteriorated Sunday, when an inversion that had been effectively keeping a lid on recent fire activity lifted, Porter said.

"When air clears, it's like taking the lid off of your pot of boiling water," he said. "All of the sudden there's that plume of heat and steam that comes out. Same thing happens on a fire. It also sucks in oxygen from all directions, puts fire and spot fires in all directions. That's what happened yesterday."

For days, the big question has been whether the Caldor fire will jump the large granite ridge that stands between it and populous South Lake Tahoe. Many residents hoped that the stony topography would act as a buffer.

In a Monday evening update, officials confirmed the fire had moved into Christmas Valley and Meyers, a town about seven miles south of South Lake Tahoe, and said so far, no structures in that area had been damaged.

Earlier that day, authorities placed much of the area under an evacuation order — a worrisome indication that crews could be losing footing on the wind-whipped fire. Red flag warnings indicating gusty winds as strong as 35 mph have been issued across much of the fire zone.

But the Caldor fire is only one of more than a dozen large fires burning in California, including some that have been churning through the landscape for weeks or even longer.

There are more than 15,000 personnel working on fires in California, including nearly 1,200 fire engines, 315 hand crews, 367 dozer units, 411 water tenders and 111 helicopters, Mark Ghilarducci, director of the California Governor's Office of Emergency Services, said Monday.

More than 43,400 Californians have been told to evacuate, he said.

"We know these are difficult times and we continue to be all hands on deck," he said.

On of the state's highest priority fires, the multi-county Dixie fire burning in Northern California, has long since claimed the title of the second largest wildfire in the state's recorded history. On Monday, the fire was 771,183 acres and 48 per cent contained.

It, too, prompted new evacuation warnings Sunday, even as evacuation orders for other parts of the fire were reduced or lifted. Officials said crews on the Dixie fire would also contend with gusty red flag conditions through Tuesday.

Cal Fire officials deemed both the Dixie and the Caldor fires critical, with Porter on Monday noting that both blazes continued to display unprecedented behavior.

He noted that before this year, no fire was known to have burned from one side of the Sierra to the other. Both the Caldor and Dixie fire have now achieved that feat.

"Two times in our history and they're both happening this month," Porter said. "So we need to be really cognizant that there is fire activity happening in California that we have never seen before."

Evacuation orders and warnings were also in place for areas near the Chaparral fire, which ignited Saturday along the border of Riverside and San Diego counties [in southern California].

That fire had grown to 1,427 acres and was 13 per cent contained Monday morning, officials said. The blaze generated a massive fire whirl over the weekend that sent smoke and flames aloft.

Meanwhile, the French fire, in Kern County [north of Los Angeles], and the Monument fire, in Trinity County [north of Sacramento], continued to challenge beleaguered fire crews, although firefighters were starting to gain some control. As of Monday morning, the French fire had grown to 25,264 acres and was 26 per cent contained.

In a Monument fire update, Cal Fire officials said the state "has experienced large fire activity and will likely experience an extended fire season."

"Fires burning in Northern California are exhibiting extreme fire growth based on critical fuel conditions," they said. "Firefighters are experiencing conditions never seen before, such as increased rates of spread, spotting and active nighttime burning."

As of Monday morning, the 164,746-acre Monument fire, which has been burning for 31 days, was 29 per cent contained.