As it tornadoes aren't dangerous enough,some of them can actually be made of fire. When a wild fire reaches very hightemperratures,it causes the air to become hot and to rise. Cooler air rushes into replace the hot air. Thiscreatesstrong winds. These winds suck up burning plants and even the fire it self. When this happens, like it did no March 14,2014,in Denver, Colorado, U.S.A., a tornado of fire is produced. This tornado can become 15 meters wide and grow as tallas a 40-story building.