The United States is the tornado capital of the world . Each year, about 1,000 tornadoes are reported here! Only a small portion of these are dangerous. In 2001, for example, just eight were rated very strong to violent (3 to 5 on the Fujita scale, which measures wind speed). Here are the worst years for serious twisters.
1. 1975: 116 tornadoes rated F3 or above