Crews were fighting a human-caused wildfire in Redington Pass east of Tucson on Saturday night that had consumed 125 acres by early evening.
Firefighters used a helicopter, three heavy air tankers and an air attack plane in addition to ground crews to keep the blaze from spreading, said Heidi Schewel, spokeswoman for the Coronado National Forest.
The fire burned about 14 miles up Redington Pass Road, but no structures were threatened Saturday night.
Drivers were told to avoid the area. Schewel anticipated the road would be shut down while crews fought the fire overnight.
“This is an indication of how dry things are,” she warned. “All it takes is an ignition source.”