The fire, which started just before 1 p.m. is now 40 percent contained.
Location: City of Riverside Grand Avenue X Rubidoux Avenue near near Grassy Trail Drive and Deerfield Road,
Evacuations: Two small neighborhoods — comprising 12 adults and five dogs — were under mandatory evacuation orders, and two others, about 100 homes, were urged to evacuate, but that order was voluntary, Wesche said.
Injuries: One of the injured firefighters complained of chest pains and was taken to a hospital for observation, he said. A second firefighter suffered heat exhaustion and was treated at the scene.
No civilians have been hurt in the blaze.
Damages: 1 structure that was damaged was an outbuilding.
Cause: Under investigation