Halstenberg's vehicle was connected to three fires that started on the same day as the Line Fire, which has resulted in injuries to four firefighters.

Evacuation warnings were issued for the Angelus Oaks and Boulder Bay areas near Big Bear Lake due to the ongoing fire threat.

The fire has caused damage to at least four structures and destroyed one since it began.

The Line Fire, suspected to be arson-related, ignited on September 5 and has since burned approximately 40,219 acres, threatening over 65,000 structures.

Justin Wayne Halstenberg, a 34-year-old man from Norco, California, has pleaded not guilty to 11 arson-related charges linked to the Line Fire.

As of Sunday, the Line Fire was reported to be 83 percent contained, with 1,176 personnel assigned to combat the blaze.

The fire flared up again on Sunday, prompting new evacuation orders for residents in Seven Oaks and Barton Flats.

Firefighters have faced significant challenges due to steep terrain, and efforts are underway to establish a heli-spot for air support.

Cal Fire has deployed at least 10 helicopters to assist in firefighting efforts, although operations have been hindered by unauthorized drones.

Residents in affected areas, including all campgrounds and cabins, were ordered to evacuate due to the immediate threat of the fire.

Fallsvale Elementary School announced it would close on Monday due to the fire, while other schools in the Bear Valley Unified School District remain open but under air quality monitoring.

Witnesses described the fire's smoke plume as apocalyptic, with one resident likening it to a nuclear explosion in the mountains.