RIALTO (CBSLA) — A fast-moving brush fire estimated at about 20 acres burned near homes in Rialto on Tuesday night as Santa Ana winds whipped up.

The “Sierra Fire” broke out near the 15 Freeway and the Glen Helen Amphitheater around.

Crews were using dozers to attack the fire, making progress some progress around 11 p.m.

Santa Ana winds picked up embers and pushed smoke into the air. Plumes of thick smoke could be seen miles away.

CBS2’s Stu Mundel was over the scene as flames drew closer to homes.

It is unclear if any structures caught fire.

No official evacuation orders were immediately issued.

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