Infographic: When A Tornado Destroys Everything

May 19, 2013; 1:18 AM ET
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The Enhanced Fujita Scale is used to assign tornadoes a rating based on estimated wind speeds and damage.

The EF Scale became operational on Feb. 1, 2007. It was revised from the original Fujita Scale, developed in 1971 by Tetsuya Fujita, to better reflect wind speed with damage observed in tornado surveys.

Deadly Severe Weather Facts & Safety Tips:

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