Firefighters were mopping up the remaining hot spots of a brush fire in Riverside Sunday night, officials said.
The fire was reported about 4 p.m. in the Santa Ana River bed south of Mount Rubidoux, according to the Riverside Press-Enterprise.
The size of the fire was not immediately clear, but firefighters got the blaze down to about 4 acres by sundown. Crews were still mopping up hot spots as of 9 p.m.
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Officials said the blaze started near a homeless camp, but it was not clear how it started.
The small brush fire was one of two that sparked Sunday, the other in Santa Clarita. That blaze was reported near San Francisquito Canyon Road and Lowridge Place and was contained within a couple of hours.
The fires come amid red flag warnings prompted by extremely warm, dry and windy conditions.