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Slightly cooler weather is helping firefighters make progress against a huge blaze in mountains east of Los Angeles.

The wildfire straddling Riverside and San Bernardino counties has consumed about 43 square miles of brush and trees. It’s 30% contained.

As of Wednesday evening, four homes had been destroyed, fire officials said.

But most residents forced from their homes by the flames have been allowed to return.

The blaze, sparked by a malfunctioning vehicle, burned a dozen buildings, including four homes.

To the northwest, crews are battling a fast-growing wildfire that’s prompted evacuations of rural communities in Kern County.

The blaze south of Lake Isabella is 20% contained. The cause is under investigation.