"It's our duty to save life and property", he said. It was deemed the third most destructive blaze since 1932.
Smoke poured into the Bay Area from the County Fire, and ash was visible on cars and homes Sunday. No casualties have been reported.
Firefighters work to control a fire as flames from the County Fire jump across Highway 20 near Clearlake Oaks, California, on July 1, 2018.
The United States is in the midst of a more-active-than-usual fire season, with the risk significantly above normal for many western states, according to federal forecasters.
More than 2,000 firefighters from across the state are on the frontlines with little chance to sleep.
"We've got hot, dry and windy conditions", Helmerick said.
The Knoxville Wildlife Area and Berryessa Peak Trail have been especially hard hit.
The Spring Fire in Costilla County, which started on Wednesday, has destroyed 104 homes and is now the largest fire burning in the state.
There's another fire called the Creek Fire on the map, and that one is 1,678 acres and 97 percent contained. So far, it is only 5 percent contained.
A mandatory evacuation order remains in effect for the community of Double Eagle. Ten engines, two crews and three water tenders will stay on the fire for continued mop-up and patrol. Officials say more assessments will come as conditions allow.
A wildfire burns grasses at a livestock ranch in Guinda Sunday.
A wildfire burning in central OR forced residents from their homes and shut down USA 26 for almost six hours east of Warm Springs on Monday.
However, any lingering smoke from the fires could be pushed out of the region by some westerly winds on Monday, according to Anna Schneider of the National Weather Service in Monterey.
It wasn't immediately known how much land had burned.
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