LOS ANGELES, Aug. 6 (Xinhua) -- A fast-moving wildfire in western U.S. California State, dubbed the Mendocino Complex fire, became the largest wildfire in state records Monday, the authorities said.

As of Monday evening, the fire had charred 283,800 acres (1,148 square km) in northern California, with only 30 percent contained. It had destroyed 75 residences and was threatening more than 11,300 structures.

"We broke the record," Scott McLean, a deputy chief with California Department of Forestry and Fire Protection (Cal Fire), was quoted as saying by the Los Angeles Times daily, adding that it's one of the records people don't want to see.

"Crews worked throughout the night to reinforce containment lines while the fire behavior remained extreme. Weather conditions will continue to challenge firefighters as hot, dry and windy conditions persist," Cal Fire said in an update Monday evening.

More than 3,900 personnel are battling the destructive blaze, aided by 441 engines, 15 helicopters and 85 dozers. Cal Fire said more engines, water tenders and dozers are on the way to help extinguish the fire.