Two firefighters were injured battling a wildfire in the Angeles National Forest, a spokesperson for the Angeles National Forest told KPCC.
One of the firefighters was from Los Angeles County, while the other was a Forest Service firefighter, the Angeles National Forest's Justin Tyler tells KPCC.
"The one from L.A. county was flown to a local hospital for evaluation. Both injuries were heat-related injuries," Tyler said.
The wildfire has burned about 65 acres of brush in the Angeles National Forest, but so far no homes or buildings are threatened, officials said. The area is in the San Gabriel Mountains several miles north of La Verne and east of the San Gabriel Reservoir, KTLA reported.
A forest spokesman, John Wagner, tells KPCC that the fire was reported shortly before 1 p.m. Thursday above the foothill city of Glendora northeast of Los Angeles.
The L.A. County Sheriff's Department reported that Highway 39 was closed to all traffic.
Portions of Glendora Mountain and Glendora Ridge roads were also closed, KTLA said.
Aircraft are helping ground crews battle flames in hot, dry weather.
There's no word on what sparked the blaze.
This story has been updated.