The Dragon Bravo fire has been burning for more than a month, fueled by record-low humidity that has hampered containment efforts.

The Dragon Bravo Fire exploded in size along the Grand Canyon’s North Rim this week as heat and strong winds drove the growth.

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.