CDPHE said the smoke is mostly due to the Dragon Bravo fire in northern Arizona and the Monroe Canyon fire in central Utah.

The Dragon Bravo Fire on the North Rim of the Grand Canyon has grown to more than 105,000 acres and has become the largest active wildfire in the nation.

The term megafire is a matter of some debate; however, research shared by the USFS in 2024 looked at the use of the term ...