The Bighorn Fire burns heavy fuel along the La Canada Del Oro Ridge on Wednesday, June 17, 2020. The Bighorn Fire burns heavy fuel along the La Canada Del Oro Ridge on Wednesday, June 17, 2020.Photo by: U.S. Forest Service Bighorn Fire Photo by: Pima County Twitter Bighorn Fire Bighorn FirePhoto by: U.S. Forest Service Bighorn Fire Bighorn FirePhoto by: Pima County Sheriff's Department The Bighorn Fire burning in the Catalina Mountains creeps toward toward Mount Lemmon The Bighorn Fire burning in the Catalina Mountains creeps toward toward Mount Lemmon. Photo courtesy of Greg Gaunt The Bighorn Fire burning in the Catalina Mountains creeps toward toward Mount Lemmon The Bighorn Fire burning in the Catalina Mountains creeps toward toward Mount Lemmon. Photo courtesy of Greg GauntPhoto by: Greg Gaunt The Bighorn Fire burning in the Catalina Mountains creeps toward Mount Lemmon The Bighorn Fire burning in the Catalina Mountains creeps toward Mount Lemmon. Photo courtesy of Greg GauntPhoto by: Greg Gaunt Bighorn Fire Bighorn fire grows to more than 4,000 acresPhoto by: Kelvin Garcia The Bighorn fire in the Catalina Mountains The Bighorn fire in the Catalina Mountains. Photo courtesy of Debbie AngelPhoto by: DEBBIE ANGEL The Bighorn Fire in the Catalina Mountains The Bighorn Fire in the Catalina Mountains. Photo courtesy of JesseJ.MediaPhoto by: Jesse Jackson The Bighorn Fire in the Catalina Mountains The Bighorn Fire in the Catalina Mountains. Photo courtesy of JesseJ.MediaPhoto by: Jesse Jackson KGUN 9 Weather Camera sponsored by Simply Bits A KGUN 9 Weather Camera sponsored by Simply Bits shows the Bighorn Fire in the town of SummerhavenPhoto by: KGUN 9 Weather Camera sponsored by Simply Bits Smoke billows from a ridge after a slurry drop on the Bighorn Fire in the Catalina Mountains Smoke billows from a ridge after a slurry drop on the Bighorn Fire in the Catalina Mountains. Photo courtesy of Elizabeth Amstutz LIVE UPDATES: Bighorn Fire grows to 7,092 acres The Pima County Department of Environmental Quality issued an air pollution health watch Tuesday due to fire smoke from the Bighorn Fire and Tortolita Fire.Photo by: Pima County Department of Environmental Quality The Bighorn Fire as seen in the pre-dawn hours on June  23rd from Biosphere Road The Bighorn Fire as seen in the pre-dawn hours on June 23rd from Biosphere Road. Photo courtesy of Andy HallPhoto by: Andrew Hall Bighorn Fire in the Catalina Mountains Bighorn Fire in the Catalina Mountains. Photo courtesy of Elizabeth Amstutz. An air tanker drops fire retardant near the Bighorn Fire An air tanker drops fire retardant near the Bighorn FirePhoto by: U.S. Forest Service The Bighorn fire in the Catalina Mountains The Bighorn fire in the Catalina Mountains. Photo courtesy of Debbie AngelPhoto by: DEBBIE ANGEL Firefighters at the Bighorn Fire Firefighters at the Bighorn FirePhoto by: U.S. Forest Service Bighorn fire through the eyes of a fire Captain Bighorn fire through the eyes of a fire CaptainPhoto by: Eric Huddleston (FILE) Fire crews stationed on Mt. Lemmon and in the Summerhaven area after the Bighorn Fire. (FILE) Fire crews stationed on Mt. Lemmon and in the Summerhaven area after the Bighorn Fire.Photo by: Pima County Sheriff's Department bighornfire-20200606-sm_original.jpg The Pima County Department of Environmental Quality issued an air pollution health watch Tuesday due to fire smoke from the Bighorn Fire and Tortolita Fire.Photo by: Pima County Department of Environmental Quality Tuscon Lightning Fire by Vinson La Noir.jpg Vinson La Noir took this photo of the Bighorn Fire.Photo by: Vinson La Noir Bighorn Fire burn scar near Mt. Lemmon Fire Department Photo by: Pat Parris Debris floods canada del oro wash Photo by: Pima County Bighorn Scar Photo by: David Keller Mt. Lemmon Highway damage from Bighorn Fire Mt. Lemmon Highway damage from Bighorn FirePhoto by: Pima County Department of Transportation