Salt Lake City, Shawwal 3, 1438, Jun 27, 2017, SPA -- The nation's largest wildfire has forced more than 1,500 people from their homes and cabins in a southern Utah mountain area home to a ski town and popular fishing lake. Firefighters battled high winds as they fought a fire that has grown to 72 square miles (184 square kilometers) and burned 13 homes - larger than any other fire in the country now, AP quoted state emergency managers as saying. Some flames reached 100 feet high, while fire crews faced dry, windy conditions Tuesday and a "high potential" for extreme fire behavior, officials said late Monday. The estimated firefighting costs now top $7 million for a fire started June 17 near the Brian Head Resort by someone using a torch tool to burn weeds, they said. Investigators said they know who the culprit is, but they haven't yet released the person's identity or what charges will be leveled. Crews in California, meanwhile, had to deal with two new powerful and fast-growing fires, and Arizona firefighters had to ground aircraft because of unauthorized drones over a fire near Flagstaff. The Utah fire began near the ski resort town of Brian Head. It has spread several miles east to an area around Panguitch Lake. Authorities ordered more evacuations Monday in a sparsely populated area as stronger winds and lower humidity develop that could push fire growth north after calmer weather kept its growth in check over the weekend. The fire is about 10 percent contained. About 175 people have been briefly allowed back to their homes near Panguitch Lake since Sunday under escort, said Denise Dastrup with the Garfield County Sheriff's Office. --SPA 13:12 LOCAL TIME 10:12 GMT www.spa.gov.sa/w436778