Thousands of firefighters have been battling wildfires across 45 square miles of densely populated Los Angeles County. The two largest fires, the Palisades Fire in Pacific Palisades and the Eaton Fire near Pasadena, remain active.

The Hughes fire has burned through 3,407 acres since it started late Wednesday morning, according to local officials.

Firefighters are responding to a brush fire in the Castaic area of Los Angeles County Wednesday morning, according to the Angeles National Forest.

Ferocious flames devoured hillsides near Castaic Lake, spreading rapidly to cover more than 9,400 acres (3,800 hectares) in just a few hours.

Offramps along Interstate 5, a major north-south artery, were closed as flames raced along hilltops and down into rugged canyons.

Eaton Fire initially started 6:18 p.m. Jan. 7 in Los Angeles County. Since its discovery 15 days ago, it has burned 14,021 acres. A fire crew of 2,104 has been working on site and, as of Wednesday afternoon, they managed to contain 91% of the fire. However, investigations into the cause are ongoing.

Dozens of people are believed to have died in the Palisades and Eaton fires, which have burned down whole swaths of communities

A wildfire erupted near Castaic Lake Wednesday, sending plumes of smoke into neighboring Ventura County areas. Here's what to know.

A fast-moving wildfire exploded to more than 9,200 acres near the Los Angeles County community of Castaic Wednesday morning, prompting mandatory evacuation orders and road closures, authorities said.

Firefighters on the ground and in the air rushed to slow a rapidly spreading brush fire that exploded near Castaic on Wednesday, forcing tens of thousands of evacuations and impacting traffic on the 5 Freeway.

A brush fire erupted amid powerful winds Wednesday afternoon in the Castaic area in the northern region of Los Angeles County, spreading quickly to at least 9,400 acres near the freeway, officials said.