Fierce winds, bone-dry weather and high temperatures are expected on Thursday in northern California, where they could threaten efforts to fight the largest wildfire in state history.
Wind gusting up to 35 miles (56 km) an hour, temperatures above 90 degrees Fahrenheit (32 C) and 10 percent humidity are in the forecast from Thursday afternoon to Saturday in northern California.
Firefighters in the area are battling the Mendocino Complex and the Carr Fire, the National Weather Service said in a Red Flag warning.
More than 4,000 firefighters were confronting the Mendocino Complex, which covered more than 302,000 acres (122,215 hectares) on Wednesday, making it the largest wildfire in California history.
Two firefighters have been injured and 119 homes destroyed, the California Department of Forestry and Fire Protection (Cal Fire) said.