By Tuesday evening, the Fairview fire near Hemet had burned through 4,500 acres and fire officials continued to expand evacuation orders as the blaze threatened about 3,500 structures.
At least seven structures were destroyed and several more were damaged, according to the Riverside County Fire Department.
Two residents in Avery Canyon were killed while trying to flee, officials said. A third was injured.
The cause of the fire remained unknown, but Southern California Edison reported “circuit activity” about the same time the first flames were reported at 3:37 p.m., the utility company said.