The fire is burning in communities around Prescott, a mountain city about 160.9 kilometres north of Phoenix that draws a mix of desert dwellers escaping the heat, retirees and visitors to its famed Old West-themed Whiskey Row.
The fire has charred 83 square kilometres while being fanned by winds ranging to 56 kph winds.
More than 500 firefighters were battling the blaze yesterday. A firefighter suffered a minor injury.
Many residents have painful memories of the 2013 wildfire that killed 19 members of an elite firefighting crew.
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"It's scary because we're coming up on the four-year anniversary of the Yarnell Hill fire - there's still a lot of fresh memories," said Arizona state Sen. Karen Fann, who lives in Prescott and represents the area where the fire is burning.
Elsewhere across the western US, a fire in the foothills north of Los Angeles was burned right up to homes before the blaze was beaten back.
No homes were destroyed, and most evacuations were cancelled after a few hours.
In Central California, a wildfire destroyed the home of "Big Bang Theory" star Johnny Galecki on a ranch in the San Luis Obispo area.
In Utah, firefighters braced for more high winds as they tried to slow a stubborn wildfire that has burned 13 homes and forced the evacuation of 1,500 people from a ski resort town. Firefighters in Washington state were battling three fires near Wenatchee that had grown to about 95 square kilometres.
In Arizona, Jennifer Johnson of Phoenix was driving into Prescott Valley on Tuesday for a meeting and noticed smoke on the way in. By the time the meeting wrapped up a few hours later, things had changed dramatically.
"Getting closer to Mayer, it looked like we were driving into some alien sort of invasion, like the whole sky was on fire," she said.
Arizona Gov Doug Ducey plans to visit the area today after declaring a state of emergency in Yavapai County that directs USD 200,000 in emergency funds to fire suppression efforts and reimbursements for emergency response and recovery costs.
It's also a key requirement should federal aid resources be requested.
The blaze is burning in thick chaparral that has not seen a fire in more than 40 years. The steep, rugged terrain makes it difficult for firefighters to reach.