Since it began on Tuesday, the Rancho Cucamonga fire has destroyed 14 homes and one outbuil-ding. About 1,700 people had been evacuated, county sheriff's spokeswoman Sandy Fatland said.
Other wildfires threatened to spread as winds and heat rose.
In northern Los Angeles County, 48km from downtown Los Angeles, a fire near Santa Clarita swelled to 1,680 hectares and a voluntary evacuation was called for 328 homes in the town of Piru, less than five miles away.
Authorities feared that fire might connect to a fire near Piru in Ventura County, which had charred about 500 hectares on Saturday. Four firefighters were injured.
At the Camp Pendleton Marine Corps Base, 80km north of San Diego, firefighters battled a 1,880-hectare blaze that threatened about 300 homes in nearby De Luz. Five firefighters were injured and more than 1,300 were on the line.
RSS