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Children's LiteratureMost of what we know about tornadoes meteorologists learned in the 1950s, but there is still a lot to learn. They are the third largest cause of weather related deaths in the U.S. Countries all over the world experience tornadoes including Australia and Bangladesh. In the United States there is a strip of land called "Tornado Alley" which covers eighteen states, including Texas, a state that averages 125 tornados per year. Tornadoes can be seen in many different shapes and sizes, but they function the same. They last anywhere from five to thirty minutes on average. Today's technology helps to forecast tornadoes and increase warning time. Storm chasers gather information and take photographs. A tornado can cause destruction from wind, items it carries away, hail and lightening. Mobile homes are the most vulnerable. In 2002, more than half of all tornado deaths in the United States were in mobile homes. In 1973 a meteorologist introduced the Fujita Scale rating tornadoes from an F-0 (weak) to F-5 (violent). The first recorded tornado was in 1091 in London, England. This book is part of the "Disaster Alert" series, and includes a glossary, index, and a tornado safety plan. 2004, Crabtree Publishing Company, Ages 9 to 12.