The Frye Fire was a wildfire that burned 48,443 acres (19,604 ha) in Graham County, Arizona, United States, from June 7 to September 1, 2017. The fire was ignited by a lightning strike on Mount Graham, within the Coronado National Forest, and spread rapidly until it was mostly contained on July 12. The fire destroyed three buildings and briefly threatened the Mount Graham International Observatory. It cost $26 million (equivalent to $32 million in 2023) to contain and suppress, and involved more than 800 firefighters. There were no fatalities, but 63 firefighters were quarantined with strep throat. During seasonal rains beginning in July, ash and debris from the Frye Fire's burn scar washed off the mountain slopes, then clogged creeks and damaged infrastructure within Graham County. The fire particularly impacted the endangered Mount Graham red squirrel, whose remaining habitat on Mount Graham was devastated. (Full article...)