Latest: Firefighters fight to curb blaze before winds return

The Holy Fire burns in the Cleveland National Forest at a hillside near homes in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. C

The Holy Fire burns in the Cleveland National Forest at a hillside near homes in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. C

A firefighter keeps watch on the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo

A firefighter keeps watch on the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo

Members of Cal Fire take pictures while a plane drops water on the Holy Fire in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug.

Members of Cal Fire take pictures while a plane drops water on the Holy Fire in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug.

Firefighters keep watch on the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.

Firefighters keep watch on the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.

The Holy Fire burns in the Cleveland National Forest at a hillside near homes in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. C

The Holy Fire burns in the Cleveland National Forest at a hillside near homes in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. C

Firefighters battle the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. Chiu

Firefighters battle the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. Chiu

The Holy Fire burns the backyard of a home in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. Chi

The Holy Fire burns the backyard of a home in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. Chi

A firefighter battles the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. Ch

A firefighter battles the Holy Fire burning in the Cleveland National Forest in Lake Elsinore, Calif., Thursday, Aug. 9, 2018. (AP Photo/Ringo H.W. Ch

Hummer Estes watches a helicopter battling the Hat Fire, Thursday, Aug. 9, 2018, in Fall River Mills, Calif. (AP Photo/John Locher)

Hummer Estes watches a helicopter battling the Hat Fire, Thursday, Aug. 9, 2018, in Fall River Mills, Calif. (AP Photo/John Locher)

A sheriff's deputy stands guard at a gate near a hillside as the Holy Fire burns in the Cleveland National Forest at Temescal Valley in Corona, Calif.

A sheriff's deputy stands guard at a gate near a hillside as the Holy Fire burns in the Cleveland National Forest at Temescal Valley in Corona, Calif.

LAKE ELSINORE, Calif. (AP) — The Latest on California wildfires (all times local):

6:15 a.m.

Firefighters battled through the night to keep a raging forest fire from reaching foothill neighborhoods in Southern California.

The arson blaze in the Cleveland National Forest gained renewed strength Thursday, racing along ridges and coming within yards of homes.

Crews on Friday are allowing some hillsides to burn, to reduce fuel and make it harder for flames to jump roadways later in the day when the winds pick up.

Hundreds more firefighters have joined the battle, bringing the total to 1,200. The fire has blackened 16 square miles (41 square kilometers) of timber and brush and is only 5 percent contained. More than 20,000 residents are evacuated.

California Gov. Jerry Brown has declared a state of emergency for Orange and Riverside counties.

A man charged with intentionally setting the fire is scheduled for arraignment Friday.

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8 p.m. Thursday

California Gov. Jerry Brown has declared a state of emergency as a wildfire that forced 20,000 people from their homes continues to rage south of Los Angeles.

Brown issued the declaration Thursday for Orange and Riverside counties because of a fire in the Cleveland National Forest that's threatening thousands of homes.

The fire near Lake Elsinore is devouring brushy foothills, ridgetops and canyons. It's blackened 16 square miles (41 square kilometers) and is only 5 percent contained.

On Thursday, flames came within yards of some homes.

A man charged with intentionally setting the fire is scheduled for arraignment on Friday.