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.

Mark E. Potts is the senior editor for video at the Los Angeles Times. A native of Enid, Okla., Potts graduated from the University of Oklahoma with a master’s degree in broadcast journalism. He has created and edited video for DreamWorks, YouTube, Microsoft, Sony and BET.

A firefighting helicopter pulled off a clean water drop over the Hughes Fire in the Castaic area of Los Angeles County.

Powerful winds and bone-dry conditions were expected to pose a challenge to firefighters battling new wildfires in southern California on Thursday, including a new blaze that swelled over the past day,