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Tri-State Tornado ??? This was the deadliest and longest-tracked single tornado in U.S. history, producing the highest tornado-related death toll in a single U.S. city (234, at Murphysboro, Illinois) and the largest such toll in a U.S. school (33, at Desoto, Illinois).[67] Thousands of structures were destroyed, with hundreds of homes swept away along the path, especially in Illinois and Indiana.
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