The fire in Shasta County was estimated at more than 31 square miles (80 square kilometers) Thursday morning.
One of the fires McGlover allegedly started is the Cranston Fire, which is actively burning on Federal land in the San Jacinto Ranger District, and is now 4,700 acres with zero percent containment.
William Blodgett of Idyllwild said he couldn't get home because of the fire and had to wait along with others at a gas station in nearby Mountain Center - until the fire hopped a highway and began to move in his direction. According to county officials, the blaze threatened at least 600 structures, with at least 110 homes evacuated. Brandon N. McGlover, 32, of Temecula was booked on suspicion of five counts of arson, state fire officials said.
Campgrounds in Idyllwild were also under evacuation orders, including Idyllwild Arts, Camp Maranatha, Idyllwild Pines, AstroCamp, Camp Emerson and Tahquitz Pines, according to the volunteer organization Mountain Disaster Preparedness, which runs the website idyllwildemergency.com. It's unclear whether he has an attorney.
A house is covered in pink fire retardant as the Cranston Fire burns out of control near the town of Idyllwild in the San Bernardino National Forest on Wednesday.
Helicopters and planes dumped water and fire retardant on the area.
By Thursday, the fire was contained approximately 10 percent.
To the northeast, the Ferguson Fire forced the heart of the Yosemite National Park to close on Wednesday after the blaze burning just to the west jumped fire lines overnight, pouring thick smoke into the valley and forcing visitors to pack up camp and flee. One firefighter was killed July 14, and six others have been injured.