The fire is at 750 acres with 0% containment burning in light fuels at a moderate rate. One-hundred firefighters, nine engines and one helicopter are battling the flames.
About 475 firefighters from several agencies, including Cal Fire and Riverside County Fire Department were working to put out the blaze.
Officials did not provide details on the fireworks, nor if anyone was in custody.
A fast-moving brush fire west of Beaumont in Riverside County that erupted Saturday afternoon has grown to 1,000 acres and forced some residents to evacuate their homes. Voluntary evacuations were in place for Outer Highway 10 from Live Oak Canyon Road to Alta Vista and on Alta Vista to Sunset Drive and Sunset Drive to Helen Court.
Residents living on Live Oak Canyon Road between San Timoteo Canyon Road and Interstate 10 in Redlands were ordered to evacuate at 3:30 p.m., Hagemann said. As he drove closer, he realized the flames were headed straight for his home. Cal Fire said investigators determined the cause was fireworks. An evacuation center was opened at the Redlands Community Center: Redlands Community Center 111 West Lugonia Avenue Redlands, CA 92374An evacuation center for large and small animals was set up at the Yucaipa Equestrian Center, located at 13273 California Street X G Street Yucaipa, CA 92399.