The Enhanced Fujita Scale (EF Scale) is a scale that gives damaging power of a tornado and tornado strength rating. It was developed by Dr Fujita.Starting from EF0, EF 1, EF 2,EF3,EF4,EF5 and implemented in US in 2007.
The Oklahoma tornado was rated EF 5 and had a wind speed of over 200 miles per hour.
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