Dangerous weather system moves to US East Coast, with warnings for high winds stretching from Florida to New Jersey.
At least 37 people have died across seven states as powerful storm systems swept through the Midwest and the South.
A severe weather system spawned intense, long-duration tornadoes that struck parts of Arkansas, Mississippi and Missouri, leaving some communities in tatters.
Violent tornadoes ripped through parts of the U.S., wiping out schools and toppling semitractor-trailers in several states.
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