LOS ANGELES — A wildfire fueled by Santa Ana winds has closed two freeways, is threatening homes and has forced evacuations around Los Angeles.

Fire officials say the Saddleridge fire had consumed more than 4,600 acres by 3 a.m. today.

It broke out after 9 p.m. Thursday along the 210 Freeway and jumped the highway. Flames also crossed the 5 Freeway. The highways were closed because of heavy smoke.

Authorities have ordered mandatory evacuations in the Granada Hills, Porter Ranch and Oakridge Estates neighborhoods.

Several homes were seen burning in Granada Hills, and the LA fire department said an "unknown number" of homes were potentially threatened.

There were no reports of injuries.

The blaze comes as hot, dry winds are raising concerns that the region's largest utility could widen power shutoffs to prevent its equipment from sparking wildfires.

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