A truck and a street are covered in fire retardant dropped by an air tanker as crews battle a wildfire Friday, Aug. 10, 2018, in Lake Elsinore, Calif. Firefighters fought to spare homes Friday from a growing Southern California forest fire, a day after flames came perilously close to neighborhoods and destroyed one house. (AP Photo/Marcio Jose Sanchez)
A swimming pool is all that remains of a hilltop home after being burned by a wildfire that swept through Shasta County an area west of Redding, Calif., Friday, Aug. 10, 2018. (AP Photo/Michael Burke)
Homes destroyed by a wildfire are seen from an aerial view in the Keswick neighborhood of Redding, Calif., Friday, Aug. 10, 2018. Fire crews have made progress against the biggest blaze in California history but officials say the fire won’t be fully contained until September. (AP Photo/Michael Burke)
LAKE ELSINORE, Calif. — Firefighters made significant progress trying to tamp down a wildfire that threatened homes and has been raging for days south of Los Angeles, officials said Saturday.