With the Palisades and Eaton fires still not fully contained, a new Southern California blaze sparked up Wednesday north of Santa Clarita, burning more than 9,400 acres in a matter of hours, forcing evacuations by the thousands and shutting down sections of the 5 freeway.

The fire threat remains critical in Southern California, where thousands of residents were under evacuation orders Wednesday as fire crews battled the out-of-control Hughes Fire near Castaic, a suburb in the foothills and mountains of northern Los Angeles County.