In a video, a passenger in a vehicle screams: “Oh my God, I want to go!” as nearby trees burst into flames.
“I can’t breathe,” the woman says, sobbing. “Please, guys, come put it out.”
The fire erupted Wednesday afternoon in a rural area and devoured timber and brush on both sides of Interstate 5 as it nearly tripled in size overnight, officials said Thursday.
It was raging just weeks after a blaze in the Redding area killed eight people and burned some 1,100 homes.
The latest fire has blackened 23 square miles (60 square kilometers), prompting mandatory evacuations. It was moving rapidly but was still far from any large towns.
Officials from a number of agencies will meet Thursday to determine if they can reopen the highway, a key route for commercial trucks, California Highway Patrol Officer Jason Morton said.
The highway runs north from the Mexico border through California, Oregon and Washington state to the border with Canada.
The scattered homes and cabins in and around Shasta-Trinity National Forest were under evacuation orders, from the community of Lakehead north to the Siskiyou County line, said Chris Losi, a spokesman for the forest.
“It isn’t a lot of people,” he said.
The blaze was human-caused, officials said, without indicating whether it was arson or an accident.
About 17 big-rigs were abandoned along the interstate and at least four caught fire, Lt. Cmdr. Kyle Foster of the California Highway Patrol’s Mount Shasta office told the Los Angeles Times. At least two trucks were partially melted.
U.S. Forest Service workers helped the driver of one flaming truck to safety. Truckers, firefighters and others aided more drivers.
“There’s vehicles scattered all over,” Brandon Vaccaro of the California Department of Forestry and Fire Protection told the Redding Record Searchlight. “Whatever occurred here was probably pretty ugly for a while.”
About 45 miles (72 kilometers) of I-5 were closed in both directions, Losi said. The blaze also delayed Amtrak’s Coast Starlight train service between Sacramento and Oregon.
The city of Dunsmuir, with about 1,500 residents, was about 15 miles (24 kilometers) from the flames. Residents were urged to be prepared to leave if the fire threatened.
