Fire crews battling the so-called Schultz fire that has threatened hundreds of homes have made some progress, bringing 10 percent of the 10,000-acre wildfire under control, authorities said.
Crews focused Monday on protecting homes in the fire's path by digging trenches, clearing out dry brush and spraying them down.
The flames reached the back yards of some homes while coming within a few hundred feet of others, incident commander Dugger Hughes said. No structures have burned.
"The homes are looking very secure right now," he said.
Rolling clouds of black and gray smoke choked out the sky north of Flagstaff, and bright red and orange flames shot up more than 60 feet in the air. The smoke lingered over roadways, forcing drivers to use headlights in daylight hours.