In the United States a much different kind of wind causes even greater destruction. Each year, mainly in the Central U.S.. tornadoes destroy homes, kill people and throw cars hundreds of meters. The roofs of homes are ripped off and broken up. Tornadoes are long, funnel shaped winds that travel at over 50 kph. They are created by low-pressure regions of warm air. The air pressure outside a tornado is often 10 percent higher than inside a tornado.