Two wildfires burning in the western United States — including one that has become a “megafire” on the North Rim of the Grand Canyon — are so hot that they are spurring the formation of “fire clouds” that can create their own erratic weather systems.

Wildfires burning at the Grand Canyon and in Utah are so hot that they're spurring the formation of "fire clouds" that can create their own erratic weather systems.

The Dragon Bravo fire near the Grand Canyon has become the largest wildfire in the continental U.S. this year, consuming 111,000 acres and destroying the historic lodge at Grand Canyon National Park.