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CORONA (CNS) - A fire broke out this afternoon just east of Corona  Municipal Airport, scorching more than 10 acres and threatening homes.

The flames were reported about 3 p.m. in a dry riverbed near Auburndale  and Rincon streets, according to reports from the scene.

Corona firefighters, with the help of personnel from the city and county  of Riverside, were working to get a line around the blaze, with the aid of  water-dropping helicopters from Cal Fire.

At least two homes along Auburndale were evacuated as the flames  approached.

Corona police shut down several streets in the vicinity.

The cause of the fire was not immediately known.