BANNING, Calif. — Firefighters are battling a wildland fire in the Banning Pass area of Southern California, where summerlike heat is building.

The California Department of Forestry and Fire Protection says the blaze was reported around 11:30 a.m. Thursday and grew to 43 acres (17 hectares) in 45 minutes.

More than 100 firefighters, two air tankers and a helicopter have been assigned to the fire, about 85 miles (137 kilometers) east of Los Angeles.

Midday temperatures are in the low 90s, with low relative humidity.

Northwest of Los Angeles, the Ventura County Fire Department says a brush fire in the Sandstone Peak area near Lake Sherwood is holding at less than an acre.