It may be late October, but the United States wildfire season reignited across the country as a wildfire threatened homes Tuesday in Colorado and at least 10 wildfires burned from California to New Jersey, officials said.

More than 700 homes were under evacuation orders near the town of Divide, Colorado, as a wildfire continued to burn out of control Tuesday, according to Colorado firefighters.

The so-called Highland Lake Fire, which started around 4 p.m. Monday, has grown to 166 acres and remains out of control, Teller County Sheriff Jason Mikesell said.

Mikesel attributed most of the fire’s growth to firefighters who initiated backfires to keep the flames away from homes and roads.

The sheriff said investigators investigating the cause of the fire focused on a structure that was destroyed by flames. He said investigators suspect the fire was “human-caused,” but it remains unclear whether the cause was accidental or criminal.

Mikesel said firefighters on the front lines were facing winds of more than 50 mph and gusts of more than 60 mph.

“It can start a fire very quickly,” Mikesel said.

Mikesel, about 150 firefighters were battling the blaze Tuesday.

A local disaster emergency has been declared by the Teller County Board of Commissioners. A structure was destroyed Monday evening, county officials said in a statement.

No injuries were reported.

“You’re going to see everyone doing everything they can to solve this problem,” Teller County Sheriff Jason Mikesell said at a news conference Monday evening.

The sheriff’s office requested help from several area agencies because they expected winds up to 50 mph Tuesday, Mikesell said.

The National Weather Service has issued alert warnings for dangerous fire conditions in the Divide area.

Mandatory evacuations due to the Highland Lake Fire have been issued for Cedar Mountain North to Golden Bell, Wayward Wind, Snowhill, Aspen Village, Broken Wheel, Alpine View, Beaver Lake Circle, Beaver Lake Place and Star View Trail, a indicated the county.

Other homes would have to be evacuated, Mikesell said.

“We want to attack this fire very quickly and be very aggressive,” Mikesell said.

Elsewhere in the country, wildfires also prompted evacuations in Oklahoma, where the Rush Fire burned 12,000 acres in the Wichita Mountains National Wildlife Refuge, about 70 miles southwest of Oklahoma City. The Rush Fire, which started Thursday, was 48% contained as of Monday afternoon, officials said.

Red flag warnings remained in place in the Rush Fire area Tuesday morning.

The NWS also issued a red flag warning in Massachusetts, where firefighters continue to battle a 400-acre brush fire near Salem. Fire crews are also battling another brush fire that started Sunday and has consumed at least 250 acres near Middleton, Massachusetts.

At least 11 large active fires in the United States have burned more than 1 million acres, according to the National Interagency Fire Center. At least 4,000 firefighters were battling the blazes, according to the center.

Wildfires were also burning in Michigan, Wyoming, Utah, Oregon and New Jersey.

The elevated risk of wildfires comes amid record temperatures across the country. High temperature records were tied or broken in dozens of cities Monday, including Oklahoma City; Kansas City, Mo.; Wichita, Kansas, Minneapolis, Minnesota; Witchita Falls, Texas; and Austin, Texas.

Temperatures climbed Monday to nearly 80 degrees in Minneapolis and Chicago.

The NWS also issued a rare red flag warning this week for New York City, which hasn’t had rain in about a month.

In New Jersey, Governor Phil Murphy issued a Draft Watch, advising businesses and residents to conserve water.

A wildfire that broke out last week in the drought-ravaged area near Rockaway Township in Morris County, New Jersey, has burned nearly 80 acres, officials said.

On Monday, the NWS in Philadelphia and New York City issued a special weather statement warning of a high risk of wildfire spread.

According to the release, “vegetation remains very dry and could potentially fuel fires. These conditions will favor the spread of any fires that ignite, which could quickly become difficult to control.”