Firefighters are trying to stop a fast-moving Nevada wildfire from spreading to homes in Reno

RENO, Nevada (AP) — A wildfire that mushroomed over the weekend in the Sierra Nevada foothills spread perilously close to neighborhoods in Reno, Nevada, forcing authorities to urge more than 90,000 residents to leave their homes.

The out-of-control fire has already burned some homes, but there's concern that shifting winds could push the flames into newly developed and densely packed neighborhoods on the edge of Nevada's second-biggest city.

Schools across the county were closed Monday because of the evacuations and to keep roads clear for emergency crews.

Authorities said late Sunday that the Hawk Fire had stayed in its footprint and firefighters were extinguishing hotspots while working to keep the fire from jumping a main highway and reaching areas filled with homes and businesses.

The fire began Saturday and grew to more than 23 square miles (60 square kilometers) on Sunday across foothills ringed by neighborhoods near the California state line. There was zero containment.

At least six people — three first responders and three civilians — were injured. Officials said the fire was “human-caused” but did not say whether it was intentionally set or accidental.

Videos posted on social media showed the smoldering ruins of homes and cars, with only a scorched basketball hoop still standing.

Many residents had little time to evacuate after the fire exploded in size.

“Honestly, I thought it was like in a movie,” said Ruby Delatorre, who got back from a concert only to find her home in the evacuation zone. She returned Sunday to walk to her home and get a few more possessions.

“I literally want to cry and go back for all my stuff. I just got what I thought I needed," Delatorre said.

Some who spotted the smoke on Saturday thought it was from another wildfire that has been burning the past two weeks.

Teresa Lenshyn, who is among the evacuees, said being forced to leave was chaotic and stressful. “You don’t know if the winds are going to shift and it's going to get worse,” she said.

The Hawk Fire is the third large wildfire in the rugged terrain north of Reno in the past two weeks — all caused by human activity, according to fire officials.

Extremely dry conditions across the American West have sparked a rash of wildfires this summer. Fires in eastern Washington state forced the evacuation of 60,000 people in the Spokane area in early August.

Nationwide, there have been more than 50,000 wildfires — the most over the past 10 years covering the same time period, according to the National Interagency Fire Center.

Seewer reported from Toledo, Ohio. Associated Press reporters John Raby in Charleston, West Virginia, and Jack Brook in New Orleans contributed.