Clay Fire initially started 5 p.m. Jan. 21 in Riverside County. After being active for two days, it has burned 39 acres. As of Thursday evening, 85% of the fire was brought under containment by a crew of 50 firefighters. The cause of it remains under investigation.

The Clay Fire was one of several fires that broke out in Southern California Tuesday as parts of the region sees red flag warnings through Thursday.

Firefighters in Riverside County battled a wildfire that erupted in the Santa Ana river bottom Tuesday night, prompting evacuation warnings for residents in nearby homes. The Clay Fire, first reported at 5 p.

Jurupa Valley fire crews battled a brush fire in the Santa Ana River bottom, after having extinguished a blaze in a similar location last week.

As the relentless Santa Ana winds sweep through, a new fire threat emerged in Jurupa Valley, leaving residents on edge and firefighters racing against time.

Fire crews said they stopped the forward progress of a fire that broke out on January 21 along the Santa Ana River bottom in Jurupa Valley.