Riverside County firefighters battled a brush fire burning near Perris on Tuesday afternoon.
The blaze, which was dubbed the Rider Fire by firefighters, was reported at around 1:30 p.m. near Rider Street in the Mead Valley area, according to Cal Fire.
Initially, the fire was reported to be about 10 acres, but by 3:30 p.m. it had grown to engulf 115 acres of brush.
"Numerous firefighting air tankers from throughout the state are flying fire suppression missions as conditions allow," firefighters said.
Nearly 150 firefighters and two dozen fire engines were assigned to the incident.
The cause of the fire remains under investigation. No injuries have been reported and it's unclear if the flames have threatened any structures.