FLAGSTAFF, Ariz. (AP) — A wildfire that tore through a historic Grand Canyon lodge and raged out of control Monday had been allowed to burn for days before erupting over the weekend, raising scrutiny over the National Park Service's decision to not aggressively attack the fire right away.

The fire along the canyon's more isolated North Rim where most visitors don't venture was burning quickly with no containment, fire officials said. No injuries had been reported, but more than 70 structures were lost, including a visitors center and several cabins.

Arizona Gov. Katie Hobbs called for a federal investigation into the Park Service’s handling of the fire that began with a lightning strike July 4.

“The federal government chose to manage that fire as a controlled burn during the driest, hottest part of the Arizona summer," the governor said in a social media post Sunday.

Authorities first used a “confine and contain” strategy but shifted to aggressive suppression as the fire — one of two that firefighters are dealing with on the North Rim — rapidly grew because of hot temperatures, low humidity and strong wind gusts, fire officials said.

The fire destroyed the Grand Canyon Lodge, the only lodging inside the park’s North Rim, along with employee housing and a waste water treatment plant, park Superintendent Ed Keable said Sunday.

Park officials have closed access for the rest of the year to the North Rim, a less popular area that draws only about 10% of the Grand Canyon’s millions of annual visitors.

Hikers in the area were evacuated and rafters on the Colorado River, which snakes through the canyon, were told to bypass Phantom Ranch, an outpost of cabins and dormitories. Trails to the area from the canyon’s north and south rims also were closed.

From the air, plumes of black smoke could be seen rising above the canyon walls and haze filled parts of the park.

The fire flared up Saturday night, fueled by high winds. Firefighters managed to make progress, using aerial fire retardant drops near the lodge before they had to pull back because of a chlorine gas leak at the water treatment plant, the park service said.

Hikers also were evacuated over concern that the poisonous, heavier-than-air gas could sink downhill, into the canyon.

Fire season in the western U.S.

Across the West, about three dozen fires were burning uncontained and another 80 fires were being managed to clear out vegetation that has clogged the landscape, according to the National Interagency Fire Center in Boise, Idaho.

So far this year, nearly 2.5 million acres have burned. That’s slightly below the 10-year average, the center said Monday.

A wildfire burning in southwestern Colorado closed Black Canyon of the Gunnison National Park and forced evacuations nearby. It had burned about 5.7 square miles (14.8 square kilometers) as of Monday. The fire was started by lightning Thursday on the park's south rim, a dramatic, deep gorge carved by the Gunnison River.

Fire officials said the brush and trees were very dry and there was only a minimal chance for rain in the coming days. Colorado Gov. Jared Polis issued a disaster declaration because of the fire and others in western Colorado.

Along the Grand Canyon's North Rim, the Dragon Bravo Fire that destroyed the lodge and other buildings spread to nearly 9 square miles (23 square kilometers) on Monday.

The White Sage Fire also grew significantly over the past day, now having charred 77 square miles (199 square kilometers) of terrain with no containment. Officials reported progress in battling the fire but evacuations.

History of the Grand Canyon Lodge

The Grand Canyon Lodge, known for its huge ponderosa beams, massive limestone facade and a bronze statue of a donkey named “Brighty the Burro,” was perched on the edge of the North Rim and offered sweeping views of the canyon.

Caren Carney was staying at the lodge last week with her husband, parents and 12-year-old son when a park ranger knocked on their door Thursday and told them to evacuate.

She was heartbroken Sunday to hear that such a “magical place” had burned down. After evacuating, the family from Georgia went to the South Rim and could see the blaze from across the canyon.

“I’m so glad we got to have one final look at it in the present before it was lost,” Carney said.

Aramark, the company that operated the lodge, said all employees and guests were safely evacuated.

An original lodge burned down from a kitchen fire in 1932, four years after construction was completed, according to the Grand Canyon Historical Society. The redesigned lodge using the original stonework opened in 1937.

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Ding reported from Los Angeles and Seewer reported from Toledo, Ohio. Associated Press reporters Mead Gruver in Cheyenne, Wyoming; Susan Montoya Bryan in Albuquerque; Colleen Slevin in Denver; Bruce Schreiner in Louisville, Kentucky; and Hannah Schoenbaum in Salt Lake City contributed to this report.

This photo provided by Caren Carney shows the family's view of fires over the Grand Canyon after they had to evacuate Grand Canyon Lodge, a historic lodge on the North Rim, in northern Arizona, Thursday, July 10, 2025. (Caren Carney via AP)

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This photo provided by National Park Service shows the charred remains of a building at the North Rim of Grand Canyon National Park, in northern Arizona, on Sunday, July 13, 2025. (National Park Service via AP)

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This photo provided by National Park Service shows the charred remains of a building at the North Rim of Grand Canyon National Park, in northern Arizona, on Sunday, July 13, 2025. (National Park Service via AP)

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The historic Grand Canyon Lodge on the Grand Canyon's North Rim in Arizona is seen on July 12, 2021. (Steve Marcus/Las Vegas Sun via AP)

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This undated photo provided by the National Park Service shows Grand Canyon Lodge on the North Rim of Grand Canyon, Ariz. (Michael Quinn/National Park Service via AP)

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The inside of the historic Grand Canyon Lodge on the Grand Canyon's North Rim in Arizona is seen on July 12, 2021. (Steve Marcus/Las Vegas Sun via AP)

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A map depicting the fire that destroyed the Grand Canyon Lodge and several other buildings. (AP Digital Embed)

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