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.

Firefighters are battling a lightning-caused wildfire on the North Rim of the Grand Canyon. The Dragon Bravo Fire has burned down the Grand Canyon Lodge and triggered a chlorine gas leak.

Crews fighting a wildfire were focused on stopping the flames from consuming nearby cabins, a water pumping station, mule stables and other structures, fire officials said.

Fire activity on the Dragon Bravo Fire, located at Grand Canyon National Park’s North Rim, remains “extremely active,” according to an incident update Monday.

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.