Pyrocumulus clouds, otherwise known as flammagenitus or “fire clouds,” develop due to “convection initiated by heat from forest fires, wildfires or volcanic eruption activity,” according to the World Meteorological Organization.

The Dragon Bravo Fire prompts community meetings in Fredonia and Page as 1,202 personnel fight the 123,171-acre blaze.

According to the fire tracking app WatchDuty, as of Monday, the fire had burned through over 120,000 acres. However, the blaze is only 16% contained, as dry vegetation and low humidity have made fighting it increasingly difficult.