The fire has burned for a month on the North Rim of the Grand Canyon, destroyed historic buildings and called for thousands of fire personnel.

A wildfire burning near the Grand Canyon has grown into what experts call a “megafire,” and it has even developed its own weather. The Dragon Bravo fire has been burning for a month near the Grand Canyon’s North Rim after it was sparked by lightning on July 4, according to a news release from the Southwest Area Complex Incident Management Team.

The fire in Grand Canyon National Park has grown to more than 100,000 acres amid dry weather and a weak monsoon season in Arizona.