Arizona Gov. Katie Hobbs and Arizona's U.S. Sens. Mark Kelly and Ruben Gallego have called for an investigation into the wildfire. The National Park Service claims the fire was "expertly handled."Start the day smarter.

The Dragon Bravo Fire has burned more than 8,500 acres southeast of the Grand Canyon. The fire was sparked by lightning on July 4 and has destroyed dozens of structures on the North Rim, including the historic Grand Canyon Lodge.

Nearly 400 firefighters are working around the clock on the Dragon Bravo Fire burning on the North Rim of Grand Canyon National Park, Tuesday.

The fire that burned for days on the North Rim of Grand Canyon before it became uncontrollable was "expertly handled," the National Park Service said.

Arizona officials are pressing for an investigation into the National Park Service's handling of the Dragon Bravo Fire, which spread after being managed as a controlled burn.

Gov. Katie Hobbs and Senators Mark Kelly and Ruben Gallego are calling for an independent investigation into how federal officials managed the Dragon Bravo Fire burning on the North Rim of Grand Canyon National Park.

Arizona senators are demanding answers from the Department of the Interior about allowing an ongoing wildfire at Grand Canyon National Park to burn for several days before trying to stop it.

The Dragon Bravo Fire started on July 4 at the Grand Canyon's North Rim and was 10 acres but things changed last weekend when flames went out of control. Crews let the fire burn for days and managed it for "resource objects,