Nine people have been killed so far, including four firefighters.
The fire comes as California firefighters continue to struggle to contain the deadly Carr Fire to the north of the Mendocino Fires.
"California wildfires are being magnified & made so much worse by the bad environmental laws which aren't allowing massive amounts of readily available water to be properly utilized". As of late Saturday, those fires covered 229,000 acres, according to Reuters. But the number of acres burned this year at 292,455 is about 50 percent higher than the 219,369 acres burnt last year and more than double the 118,811-acre average for the last 5 years.
McLean said firefighters are using the direct approach to prevent the fires from reaching urban areas along Clear Lake while retreating in national forests "and letting the fire come to us".
More than 14,000 firefighters are battling over a dozen major blazes throughout California, state Department of Forestry and Fire Protection spokesman Scott McLean said.
A new fire erupted Monday in Orange County, south of Los Angeles, and prompted the evacuation of two canyons and some campgrounds as it expanded into the Cleveland National Forest.
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"Fires do not know boundaries or borders and as a firefighting service we are ready to respond both within Australia and overseas", he said.
California's battles over divvying up water in the arid state are unending, but a battle between firefighters and the Pacific Ocean hasn't been one of them, according to Jay Lund, a civil and environmental engineering professor at the University of California, Davis, and a longtime analyst of the state's water wars.
Water, used in protecting homes and other structures and for dumping on flames from airplane tankers and helicopters, is critical but secondary to the larger manual efforts of clearing unburned vegetation to remove it as potential fuel around a fire's perimeter. By nightfall, the fire had burned 4,000 acres (6 square miles or 16 square kilometers) of chaparral-covered hillsides and destroyed one building.
The Ranch Fire is 225,001 acres and containment has decreased to 21% - making this fire the sixth largest in state history by itself. Mandatory evacuations are still in place for areas in Lake, Colusa, and Mendocino County.
Officials said the fire has destroyed 75 residences and 68 other structures. Trump friend Rep. Devin Nunes (R-CA) has claimed in the past that Communists are stealing water from farmers in the area. They are now deployed in California, Oregon, and Washington.
A spokesperson for PG&E says he sustained fatal injuries in a vehicle-related accident Saturday on the western edge of the Carr Fire in Shasta County.
Fifty-three of the almost 150 specialists who were requested by US officials last week arrived at the Northern California Geographic Area Coordination Center in Redding on Monday, NIFC spokeswoman Carrie Bilbao said, while the remaining firefighters were sent to Redmond, Ore.