At the time the Sawmill Fire began, a fire warning for the area from the
National Weather Service was in effect, as local wind speeds were as high as , and precipitation was abnormally low for the region. These conditions allowed the fire to spread quickly, and by the time elements of the
Green Valley Fire Department arrived at 11:11 am (MDT), the Sawmill Fire had grown to and was spreading to the north and east. Firefighters began to attempt
suppression of the fire, which was difficult in the rough terrain of the
Santa Rita Mountains. By April 24, the fire had consumed about , despite the assistance of five
airtankers and three helicopters carrying water. That night, the fire crossed and damaged
Arizona State Route 83, which runs south through the Coronado National Forest and had been closed earlier that day, and headed east across the Santa Rita Mountains. As the fire continued to spread, about 100 area residents were evacuated and 100 others east of Route 83 received pre-evacuation notices. The local chapter of the
American Red Cross opened two shelters in
Sonoita and Tucson on April 24 and 25, but they were almost totally unused and were closed on April 29. By April 25, 363 first responders were fighting the Sawmill Fire, which had grown to because of continued low humidity and high winds that made aerial firefighting impossible. Winds subsided the night of April 25–26, allowing the now approximately 600 firefighters present to halt the southern spread of the fire near
Empire Ranch, where flames came as close as to the ranch's historic buildings. The fire's area nonetheless doubled to and conditions were expected to worsen because of a
storm system in northern Arizona. Arizona State Route 83 and
Interstate 10 were closed on April 27. By 11:00 am (MST) April 27, the Sawmill Fire had burned , and efforts to suppress it had by then cost $1 million (equivalent to $ million in ). About 800 firefighters were present and made progress containing the fire with
firebreaks on April 28 and 29, despite aircraft again being grounded by the wind. Route 83 was reopened and evacuation orders for people to its west were lifted on April 27. Despite winds as fast as on April 28, the fire was fully contained and all evacuation orders were lifted by April 30. The firefighters were demobilized on May 1. ==Aftermath==