Crews are battling a wildfire that has burned about 12 acres of heavy brush in the Angeles National Forest above Glendora.
Los Angeles County Fire Insp. Don Kunitomi says firefighters responded just before noon Saturday to the blaze in the Big Dalton Canyon area.
He says a majority of the fire is burning inside the forest and no structures are threatened.
About 115 firefighters have been assigned to the fire and at least two helicopters are providing air support.