A fire in the mountains above foothill suburbs northeast of Los Angeles was 20% contained Friday after growing to 149 acres.

The East Fire erupted Thursday afternoon in the San Gabriel Mountains, north of the city of Glendora, Angeles National Forest officials said.

The East fire burned the forest northeast of Los Angeles

The East fire did not threaten any structures but did burn brush, chaparral and grass along the San Gabriel River (Robert Gauthier via Getty Images)

No structures were threatened and there were no evacuation orders.

The fire was burning in brush, chaparral and grass along the east fork of the San Gabriel River.

BRUSH FIRE BURNS 10 ACRES IN LOS ANGELES NEIGHBORHOOD

The National Weather Service said high pressure and above-normal temperatures will continue in Southern California until a low-pressure system crossing Northern California on Saturday brings a cooling trend along with gusty onshore winds.