California Wildfires

(CNN)California’s largest wildfire is spreading quickly, consuming 47,000 acres in three counties and staying active throughout the night — a time when firefighters typically make progress, a state fire official said Sunday.

The Rocky Fire was only 5% contained Sunday and was feeding on the state’s drought to grow actively, said Daniel Berlant, a spokesman for the California Department of Forestry and Fire Protection, or Cal Fire.

“This has been a very fast-moving wildfire with the dry conditions and the weather not really cooperating with us over the past week,” Berlant told CNN affiliate KCRA.

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The wildfire was burning in Lake, Yolo and Colusa counties northwest of Sacramento. More than 12,100 people in more than 5,100 structures were under some type of evacuation order or advisory as of Sunday afternoon, according to the Cal Fire website.

Almost 2,000 fire personnel, 180 engines, four air tankers and 19 helicopters are battling the Rocky Fire.