The Hughes, Sepulveda and Laguna fires are among the latest blazes for Southern California during a fourth consecutive day of red flag fire weather warnings.

Powerful winds and bone-dry conditions could pose a challenge to firefighters battling new wildfires in southern California on Thursday, including a blaze that swelled over the past day and forced tens of thousands of evacuations north of Los Angeles.

Footage from a U.C. San Diego camera captured the moment the rapidly growing Hughes Fire erupted near Castaic Lake.

The fast-burning Hughes Fire prompted evacuations on Wednesday morning after it was reporting burning near Castaic Lake in Los Angeles County. (Source: KTTV)

A fast-moving brush fire erupted in Los Angeles County on Wednesday morning, quickly racing across 1,000 acres of terrain, aided by heavy, dry fuels and pushed by gusting Santa Ana winds.

Firefighters battled two new brush fires - the Hughes Fire near Castaic Lake and the Sepulveda Fire in Bel Air, along the 405 Freeway.

More than 50,000 are under evacuation orders or warnings as a new wind-driven wildfire spreads in the mountains north of Los Angeles.

Overnight water drops helped stop the spread of a huge wildfire churning through rugged mountains north of Los Angeles.

The areas surrounding the wildfire, including the San Gabriel Mountains, the 5 Freeway corridor near Castaic Lake and Santa Clarita, are expected to be the most impacted by the Hughes fire, which started near Castaic in the Antelope Valley and exploded to 10,176 acres.

Firefighters gained more ground Thursday on a fast-moving brushfire that erupted north of Los Angeles the day before and within hours exploded to thousands of acres amid high winds, officials said.

Seven fires erupted this week across Ventura and Los Angeles counties, impacting the areas of Castaic, Oxnard, Camarillo, Santa Paula and Sepulveda Pass, joining the ongoing fires in the Palisades