Three brush fires that erupted Thursday alongside state Route 371 on the south end of Aguanga altogether blackened about 10 acres before crews contained them.
The non-injury blazes were reported about 4 p.m. nearly two miles apart, on the south side of the highway, between Yucca Lane and Wilson Valley Road, according to the Riverside County Fire Department.
Twenty-one engine crews from the Riverside County Fire Department, Murrieta Fire & Rescue and the Pechanga reservation deployed to the fires, in addition to four county hand crews, totaling 150 personnel, according to the fire department.
At the height of the firefight, four Cal Fire air tankers and a water-dropping helicopter made runs on the fires. No homes or other structures were damaged.
California Highway Patrol officers temporarily shut down access to state Route 371 from Highway 79 to the south and Lake Riverside to the north while crews used state Route 371 to stage.
The two smaller fires merged, scorching roughly two acres, while the larger fire to the north consumed about eight acres, according to reports from the scene.
There was no word on how the fires started, or whether they may been intentionally set.