Firefighters on Wednesday, April 26, continued to combat a growing wildfire southeast of Tucson, Arizona.

The blaze, dubbed the Sawmill Fire, had burned more 40,000 acres as of Wednesday, according to officials, quoted Tucson.com. Hundreds of homes were under pre-evacuation orders.

More than 600 personnel battled the fire, which was reportedly human-caused, according to Tucson News Now.