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

A wildfire destroyed a historic lodge at the Grand Canyon's North Rim and some political leaders want to know if the fire was mismanaged. One fire expert said officials should approach policy changes carefully because controlled burns are still critical to forest health.

Fire activity on the North Rim of the Grand Canyon has forced the closure of several trails and campgrounds. Meanwhile, life goes on at the South Rim where tourists endured a smokey visit Monday.

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.

Walter Foxcroft, 43, was found dead inside a hyperbaric chamber at the Arizona facility he co-founded last year.

In the last 24 hours, the fire jumped Highway 89A, a major corridor connecting the Grand Canyon’s North Rim to communities in southern Utah.

There are new concerns over hyperbaric chambers after an Arizona physical therapist was killed by a "flash fire" while inside his clinic's own chamber, according to the local fire department. The fire and circumstances are still under investigation.

The wildfires burning at or near the Grand Canyon's North Rim are still raging as strong winds, high heat and low humidity persist.