The Hughes Fire in northern Los Angeles County near Santa Clarita has led to mandatory evacuation notices for Interstate 5.

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.

The two largest fires, the Palisades Fire in Pacific Palisades and the Eaton Fire near Pasadena, remain active. One of the latest, the Hughes Fire in the Castaic area, has prompted evacuation orders for tens of thousands of people.

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.