A 400-acre brushfire in the Fairmont area near Lancaster was about 50% contained Monday, authorities said.
The fire was reported about 8 p.m. Sunday in the 20000 block of West Avenue D, said Los Angeles County Fire Department Dispatch Supervisor Michael Pittman.
The National Weather Service reported just after 9 p.m. that wind gusts up to 45 mph were driving the fire but they decreased to 15 mph shortly thereafter.
Firefighters were working to fully contain the fire, and no structures were threatened.
The California Highway Patrol issued a SigAlert at 10:05 p.m. Sunday, shutting down West Avenue D (SR 138) in both directions from 170th Street West to 210th Street West, but the roadway was later reopened.