Governor Jerry Brown has declared a state of emergency in Riverside and Shasta counties due to the blaze.
The Cranston Fire began about noon Wednesday as the apparent result of arson, according to authorities. A Temecula man, 32-year-old Brandon N. McGlover, was later arrested and booked on five counts for allegedly igniting several blazes in Riverside County. His bail was set at $1,000,000.
RELATED: Cranston Fire prompts mandatory evacuations in Riverside County's Idyllwild
No injuries have been reported.
More than 2,100 homes were evacuated in Idyllwild, Apple Canyon, Lake Hemet, Mountain Center, Hurkey Creek, along with the Camp Scherman Girls Scouts camp.
Here is a map of the terrain the #CranstonFire has burned so far; 4700 acres. The point of origin is on the SW corner along Hwy 74. You can see how close it burned to Idyllwild along the northern perimeter. pic.twitter.com/BNPgvoHFAe— Rob McMillan (@abc7robmcmillan) July 26, 2018
But some homeowners were determined to stay and take a stand against the flames.
"Once that wind hit, man, it was just incredible," said Idyllwild resident Mario Deniz. "Everybody took off and we were the last ones here but, you know, it's our homes. What can we do?"
Some 700 firefighters were at the scene east of Hemet on Thursday, where the brushfire was 5 percent contained as flames burned along Highway 74. The emergency personnel represented Cal Fire, the Riverside County Fire Department and the San Bernardino National Forest agency.
They were assisted by fire-retardant drops from aircraft and a decrease in wind conditions in the area, but temperatures were expected to reach 91 degrees by midafternoon amid 57 percent humidity.