Firefighter Justin Heiser, left, and Fire Captain John Burningham, both with Viejas Fire Department, watch as a helicopter drops water on flames as a brushfire burns next to Otay Lakes Road near Highway 94 on Saturday, May 20, 2017, in Jamul, Calif. A fast-moving wildfire has forced several hundred campers to flee a campground south of San Diego. (Hayne Palmour IV/The San Diego Union-Tribune via AP)

Fire Captain John Burningham, with the Viejas Fire Department, watches flames as a brushfire burns next to Otay Lakes Road near Highway 94 on Saturday, May 20, 2017, in Jamul, Calif. A fast-moving wildfire has forced several hundred campers to flee a campground south of San Diego. The California Department of Forestry and Fire Prevention says the blaze broke out south of Jamul Saturday morning. (Hayne Palmour IV/The San Diego Union-Tribune via AP)

Santee Fire Captain Richard Medlin watches as a brushfire burns next to Otay Lakes Road near Highway 94 on Saturday, May 20, 2017, in Jamul, Calif. A fast-moving wildfire has forced several hundred campers to flee a campground south of San Diego. (Hayne Palmour IV/The San Diego Union-Tribune via AP)

Santee Fire Captain Richard Medlin, right, and other firefighters watch a brushfire burn next to Otay Lakes Road near Highway 94 on Saturday, May 20, 2017. A fast-moving wildfire has forced several hundred campers to flee a campground south of San Diego. (Hayne Palmour IV/The San Diego Union-Tribune via AP)