Firestorms

Firestorms are huge gouts of flame that rise from the Region of Fire, shooting through the Region of Water. They create tremendous storms as they pass through the region, which rise up into the Region of Earth. At places where one can observe the Region of Water, you can sometimes see flashes of fire below the clouds.
While rare, Firestorms sometimes have enough intensity to pass all the way into the Region of Earth, where they are the horror stories told by sailors aboard Sky Galleons.