A helicopter drops water on a wildfire burning close to Highway 94 near Potrero, Calif., on Monday, June 20, 2016. (Hayne Palmour IV/San Diego Union-Tribune via AP)
A DC-10 makes a drop on the east flank of the Sherpa Fire in Santa Barbara County, Calif., Friday, June 17, 2016. (AP Photo/Nick Ut)
In this Wednesday, June 15, 2016 photo provided by the Washoe County sheriff's office, a Regional Aviation Enforcement Unit helicopter named "RAVEN" makes a water drop run over a brush fire in west Reno, Nev., before it had a near-miss with a hobby drone. The Federal Aviation Administration is investigating the incident. (AP Photo/Washoe County sheriff's office)
In this photo provided by the Santa Barbara County Fire Department, a firefighter knocks down flames as they approach a ranch near the Las Flores Canyon area west of Goleta, Calif., in the early morning hours of Thursday, June 16, 2016. The wildfire burning in rugged coastal canyons west of Santa Barbara is growing as it feeds on vegetation that hasn't burned in 70 years. (Mike Eliason/Santa Barbara County Fire Department via AP)
