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 Dragon Bravo Fire exploded in size to 105,415 acres along the Grand Canyon’s North Rim on Thursday as heat and strong winds drove the growth.

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.