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.

Evacuations are underway near the Grand Canyon as the Dragon Bravo Fire explodes to nearly 6,000 acres, destroying more than 70 buildings, including the historic Grand Canyon Lodge.

The lodge itself told a key part of history for both the Grand Canyon and the National Park Service.