As many as 91 people are feared dead in Oklahoma, where a tornado with winds of 320 kilometers an hour caused massive destruction Monday afternoon.
Massive Tornado Hits Oklahoma

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A boy is pulled from beneath a collapsed wall at the Plaza Towers Elementary School following a tornado in Moore, Okla., Monday, May 20, 2013.

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A tornado moves past homes in Moore, Oklahoma, May 20, 2013.

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A boy is pulled from beneath a collapsed wall at the Plaza Towers Elementary School following a tornado in Moore, Okla., Monday, May 20, 2013.

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John Warner surveys the damage near a friend's mobile home in the Steelman Estates Mobile Home Park, destroyed in a tornado, near Shawnee, Oklahoma, May 20, 2013.