As a hot wind shifted north and drove the flames toward Onyx Peak east of Big Bear Lake, fire crews deployed to save homes scattered among brittle-dry pines — waiting for help from a DC-10 laden with 10,800 gallons of retardant.

It never came. Shortly before 6 p.m. on Wednesday, an incident commander on the ground spotted a hobby drone buzzing near the drop site at 11,000 feet. The air tanker had to turn back, as did two smaller planes following it.

“These folks who are handling these drones, I have to assume they have no idea what they're doing,” Chon Bribiescas, a spokesman for the U.S. Forest Service, said Thursday. “They not only endangered the folks on the ground, but they endanger the pilots.”

Officials fighting the Lake fire in the San Bernardino Mountains scrambled to warn the public that it is illegal and dangerous to fly drones in restricted airspace around a fire. Unmanned aircraft are particularly hazardous because authorities have no idea who is controlling them or how they might maneuver.  Cont'd...