Smoke will be visible on Interstate 17 as a wildfire burns west of Black Canyon City.
The Bird Fire, burning in the Bradshaw Mountains, is 20 acres as of Thursday evening, according to the Arizona Department of Forestry and Fire Management.
Crews said the fire was reported Wednesday and found Thursday by aircraft.
AZ State Forestry said no structures are threatened. Crews will monitor the fire from the air, as rain is expected Thursday night.