VACAVILLE, Calif. — Authorities say multiple homes and other structures have been destroyed or damaged in two wildfires that broke out Saturday in Northern California.

KCRA-TV (http://bit.ly/2fH2lyr ) reported fire officials in Auburn northeast of Sacramento said flames that erupted in the afternoon damaged several structures. The California Department of Fire and Forestry said multiple structures were involved in the fire but could not specify how many.

CalFire also said a wind-driven fire near Vacaville that was reported in late morning quickly grew to 55 acres. The fire on the edge of a subdivision destroyed three homes, numerous outbuildings and two RVs.

The area north of Vacaville, a city 30 miles southwest of Sacramento, was under a red flag warning of fire weather conditions, including up to 30 mph wind gusts.

The fire is 65 percent contained. Its cause is under investigation.