Fires Char 4,000 Acres in Southland : Emergencies: No serious injuries reported but some families left homeless. Largest blaze erupts in Angeles forest.

Scorching temperatures and high winds fanned wildfires across Southern California on Saturday, as firefighters in four counties battled blazes that left more than 4,000 acres charred and a handful of homes destroyed.

No injuries were reported in any of the fires, the largest of which broke out about 11:30 a.m. in the Angeles National Forest in eastern Los Angeles County. In that blaze, flames quickly skipped the San Bernardino County line, consuming an estimated 2,000 acres near Pinon Hills, about 15 miles northeast of Wrightwood.

By early evening, about 800 firefighters from the two counties began to get the upper hand, said Los Angeles County Fire Dispatcher Cheryl Patterson. The cause of the fire was unknown.

At least 10 homes and one mobile home were destroyed in the fire, which sent many residents of the sparsely populated area fleeing with their livestock. The Red Cross set up a relief station for displaced fire victims at Pinon Mesa Middle School, 9298 Sheep Creek Road, in Phelan, county Fire Inspector Michael Chuck said.

An additional 500 acres were burned in the Angeles National Forest near Palmdale in a blaze that ignited at the Kentucky Springs Shooting Range on Kentucky Springs Road and Angeles Forest Highway, Patterson said. About 200 U.S. Forest Service and county firefighters fought the blaze, which was still out of control at 8 p.m., she said.

In the expensive west San Fernando Valley enclave of Porter Ranch, a brush fire erupted above homes in the area and burned about 60 acres. The blaze began about 3:50 p.m. in the 19000 block of West Kilfinan Street, said Jim Wells, a spokesman for the Los Angeles City Fire Department.

Thirty fire companies and five helicopters were called out to fight the fire, which was fueled by the Valley’s highest temperatures so far this year. The blaze was fully contained shortly before 7:30 p.m., Wells said. The cause is under investigation.

In Riverside County, another fire about 45 miles east of Hemet blackened 850 acres and threatened mobile homes and million-dollar horse ranches. No damage was reported but evacuation orders were issued for the city of Anza. Firefighters had contained about one-third of the fire by nightfall.

Orange County firefighters battled a brush fire that burned about 700 acres near the small community of Olinda Village. Firefighters contained the fire by nightfall.

No structures were damaged, but one firefighter was treated for heat exhaustion. The blaze was burning in an undeveloped area near Carbon Canyon and Olinda roads, near where Orange, Los Angeles and Riverside counties meet.

The brush fires were nurtured by some of the highest temperatures of 1994.

Burbank hit 99 degrees while Woodland Hills topped out at 103, according to WeatherData Inc., which provides forecasts for The Times.

Today’s temperatures are expected to be much the same, ranging from the 90s to 104 degrees, meteorologist Curtis Brack said.

The heat wave should be over by Monday, Brack said.