A New Jersey hiker has been missing for more than a week in Arizona’s Grand Canyon National Park where a raging “mega-fire” ...

A time-lapse video shows a fire cloud rolling over the Grand Canyon as a ‘megafire’ continues to rage on across northern ...

Pyrocumulus clouds, otherwise known as flammagenitus or “fire clouds,” develop due to “convection initiated by heat from ...

Thomas Daniel Gibbs, 35, of New Jersey, went missing in the Grand Canyon days before a mega-fire was declared, remaining ...

Both it and the Monroe Fire, burning further north near Monroe, Utah, are generating pyrocumulus clouds — sometimes called ...

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

Two wildfires burning in the western United States — including one that has become a “megafire” on the North Rim of the Grand ...

Wildfires burning at the Grand Canyon and in Utah are so hot that they're spurring the formation of "fire clouds" that can create their own erratic weather systems.

A dramatic pyrocumulus cloud, or fire cloud, formed as the large Dragon Bravo Fire burned along the Grand Canyon's North Rim ...

The wildfire—one the few to burn more than 100,000 acres this summer—is burning on the more remote North Rim 11 miles away.