Sacramento - Winds driving an uncontained wildfire in northern San Diego County subsided substantially overnight but forecasters say they will return after sunrise on Friday.
The fire erupted on Thursday and quickly burned dozens of homes as it spread over more than 15.5 km² and pushed west.
The National Weather Service says there will be a resurgence of winds after daybreak with gusts up to 96 km/h directly below mountain slopes and in passes but will be less widespread than on Thursday.
The fire also tore through a horse racing training centre, where state authorities now estimate about 25 of the 500 horses stabled there were killed.
Fire crews work among burning homes at the Rancho Monserate Country Club community in Fallbrook, Calif. (Gregory Bull, AP)
California's newest wildfire yesterday tore through retirement communities built on golf courses and killed elite thoroughbred horses in its first destructive day.
The new blaze in San Diego County means a huge swath of Southern California is now in flames. December's shockingly dry, hot and windy conditions brought on unprecedented fire danger.
The San Diego-area fire quickly grew and burned dozens of homes at Rancho Monserate Country Club.
The region's biggest fire, which is 300km north, keeps growing and has destroyed more than 400 homes and buildings.