MORENO VALLEY (CBSLA.com) — Firefighters were battling a fast-moving brush fire that broke out on a Moreno Valley hillside late Wednesday night.

The fire was reported near Merwin Street and Alessandro Boulevard around 8:30 p.m. and had spread to 175 acres by around 11 p.m. according to CAL FIRE Riverside officials.

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The flames appeared to be moving away from homes in the area and toward Lake Perris, where a campground was evacuated, officials said.

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Residents, nevertheless, were unnerved.

“It really scares me just thinking that the fire can be this intense,” Justin Read said.

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It was not immediately clear how the fire was started.