A wildfire in San Bernardino County, California flared up on Sunday, forcing evacuations, after previously being under control.
The Line Fire prompted the San Bernardino County Sheriff's Department to instruct residents of Seven Oaks to evacuate as flames surged.
The blaze was sparked on Sept. 5 in a suspected arson attack and has threatened tens of thousands of structures.
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The Sheriff's Department warned residents in Angelus Oaks and the Boulder Bay area along Big Bear Lake to prepare for potential evacuations.
As of Sunday, the Line Fire had spread across 62.6 square miles and was 83% contained, according to a San Bernardino National Forest social media post.
The fire's origins trace back to early September when authorities say it was ignited by a suspected arsonist.
A California man pleaded not guilty on Sept. 17 to starting a fire that authorities said became the Line Fire.
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Justin Wayne Halstenberg, 34, of Norco, California, was charged with 11 arson-related crimes, according to court records.
Authorities said Halstenberg's vehicle was tied to areas where three fires were started on Sept. 5, including one that grew into the Line Fire that has threatened more than 65,000 homes and injured four firefighters.
NASA images taken from space showed vast plumes of smoke billowing from the wildfires.
The Line Fire threw out so much smoke and heat that it generated "fire clouds" -- also known as pyrocumulus or flammagenitus -- in the sky above it, which were snapped from space.
A latest update from Cal Fire said that the fire had been challenging for firefighters due to the steep mountain terrain.
They said that crews were working to build a heli-spot so firefighters could be flown in to access the area.
Cal Fire said it had at least 10 helicopters working in the fire area.
Earlier this month, firefighters with the California state fire agency were forced to ground their aircraft while fighting the Line Fire because of unauthorized drones in the area.
"There have been multiple drone incursions over the Line Fire area. This has forced us to temporarily ground our aircraft which has impeded firefighting operations," CAL FIRE posted on X, formerly Twitter, on Wednesday morning. "Please help us share the message that flying drones in wildfire areas can have serious consequences."