Firefighters in Arizona were trying to contain a pair of fast-moving wildfires that destroyed a historic lodge in Grand Canyon National Park, closed a section of the park for the rest of the season and prompted calls for an investigation into federal authorities' wildfire response.

As of Monday, the Dragon Bravo fire on the North Rim had consumed more than 5,700 acres and was not contained, according to the U.S. Forest Service.

A Grand Canyon water treatment facility located at the North Rim caught fire on Saturday, causing chlorine gas to be released into the air. Multiple closures are being enforced due to the incident.

PHOENIX — Residents on the North Rim of the Grand Canyon have been ordered to evacuate due to a fire in Grand Canyon National Park. The fire, named the Dragon Bravo Fire, is approximately 150 acres and was caused by lightning on July 4, officials with the National Park Service said.