Firefighters responded to a brush fire Wednesday north of Los Angeles on a day of red flag warnings for parts of Southern California.

A new fast-moving wildfire has erupted in Los Angeles County, prompting tens of thousands to evacuate a region already reeling from the most destructive fires in its history.

A fast-moving wildfire exploded to roughly 10,200 acres near the Los Angeles County community of Castaic Wednesday morning, prompting mandatory evacuation orders and road closures, authorities said.

More than 50,000 people were under evacuation orders or warnings Wednesday as a huge and fast-moving wildfire swept through rugged mountains north of Los Angeles, as parched Southern California endured another round of dangerous winds and two major previous blazes continued to smolder.

Firefighters in Southern California are once again battling a wildfire, this time in Castaic in Los Angeles County, north of Los Angeles itself. Evacuation orders have been issued for the surrounding areas.

Officials ordered evacuations in the area surrounding the Hughes Fire on Wednesday morning, located near Castaic Lake in Los Angeles County.

The Hughes Fire has spread over 8,096 acres after starting just before lunchtime in Los Angeles County's Castaic Lake area on Wednesday.

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.