Morrison said several homes in the community of Glenisle have been burned. He said no other injuries or deaths have been reported from that area.
About 200 firefighters are fighting the wildfire, which has also forced the closure of parts of state Route 89.
Mike Reichling, Arizona State Forestry Division spokesman, told the Arizona Republic they were calling in federal help to fight the fire.
In the afternoon, the Yavapai County Sheriff's Office expanded the evacuations to include residents in the Peeples Valley area and in the town of Yarnell.
The wildfire also forced the closure of parts of state Route 89, the Arizona Department of Transportation announced. The department did not have an estimate of how long the closure would last but advised drivers to use U.S. 93 or Interstate 17 as alternate routes.
The Red Cross has opened a shelter at Yavapai College in Prescott, the sheriff's office said.
The fire started Friday but picked up momentum Sunday as the area experienced high temperatures, low humidity and windy conditions.
About two hundred firefighters are now working at the fire, but an additional 130 firefighters and more water- and retardant-dropping helicopters and aircraft are on their way.
In another Arizona fire, a two-acre blaze that started at a motorcycle salvage yard and spread to a trailer park has destroyed five mobile homes in the Gila County community of Rye, located more than 130 miles east of Yarnell.
Gila County Health and Emergency Services Director Michael O'Driscoll said no one was injured in Rye.
The fire was ignited Saturday night at All Bikes Sales located off Highway 87. It spread to neighboring federal Forest Service land but was fully contained within 12 hours of its start. The cause of the fire is under investigation.