Videos circulating on social media Thursday show the fire generating massive pyrocumulus clouds — also known as pyroclouds or "fire clouds."

SALT LAKE CITY (AP) — Two wildfires burning in the western United States — including one that has become a “megafire” on the North Rim of the Grand Canyon — are so hot that they’re spurring the formation of “fire clouds” that can create their own erratic weather systems.

Two massive wildfires burning in Arizona and Utah are doing more than scorching the landscape. They’re generating towering “fire clouds” that make firefighting nearly impossible.When Wildfires Create Their Own ClimateThese towering pyrocumulus clouds,