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.

RIVERSIDE COUNTY, Calif. - A fire broke out in Jurupa Valley as the Santa Ana winds continued to linger around Southern California.

Southern California is facing fierce fires fueled by the Santa Ana winds, which threaten homes and put firefighters to the test.

The Santa Ana winds are dry, powerful winds that blow down the mountains toward the Southern California coast. The region sees about 10 Santa Ana wind events a year on average, typically occurring from fall into January. When conditions are dry, as they are right now, these winds can become a severe fire hazard.

A brush fire broke out in the Santa Ana River’s bottom in the Jurupa Valley area just before 5 p.m. Tuesday, Jan. 21, burning 39 acres before firefighters late that night stopped the blaze from spreading. As of Wednesday morning, Jan. 22, containment was at 45%.

A rare Particularly Dangerous Situation warning has been issued for Southern California as a powerful and potentially damaging Santa Ana wind event​ is expected.

Santa Ana winds return to Southern California from Monday to Tuesday, once again raising fire danger concerns.

The Clay fire broke out in the riverbed of the Santa Ana River in Jurupa Valley just before 5 p.m. on Tuesday, Jan. 21.

The Santa Anas are expected to be most powerful Monday night into Tuesday. Fire services across the region say they are ready.

Critical fire conditions are expected to continue through Friday. But rain could be on the way this weekend. Here's what to know.

California Governor Gavin Newsom has deployed fire engines, water-dropping aircraft and hand crews across the region—to enable a rapid response if a new fire does break out, according to The Associated Press.

As Southern California shifts into recovery mode after ... Los Angeles, Orange, Riverside and San Bernardino counties. (National Weather Service) The warning comes as a result of projected high ...