The tornado was classified as an EF4 by the National Weather Service, with winds between 166-200 miles per hour. It was one of the most powerful natural disasters in recent US history.
It killed at least 24 people in Moore, Oklahoma, a suburb of Oklahoma City. Seven of the victims were school children at Plaza Towers Elementary in Moore. In the last day, at least 100 people have been pulled alive from the rubble.
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