Megafire

Today, wildfire experts call the burning of Yellowstone, located in the western United States, something else: a "megafire." | The U.S. Interagency Fire Center defines a megafire by its size: It is a wildfire that burns more than 40,500 hectares (100,000 acres) of land. | Other wildfire experts expand the definition of a megafire beyond "acres burned" to mean wildfires that have an unusually large impact on people and the environment. | In August 1988, high winds changed small, smoldering wildfires in Yellowstone National Park into raging firestorms - an event that came to be known as "Black Saturday."