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On March 18, 1925 The Great Tri-State Tornado ripped through 7 states including Missouri, Illinois, Indiana, Kentucky, Tennessee, Alabama and Kansas.

The tornado lasted a total of 3 and a half hours. At the end of the disaster it was calculated that it had caused $1.4 billion in excessed damages. It was estimated that 1,000 people died and 3,000 were injured, although only 747 deaths were reported.

At one point the tornado was reported to be a category F5 tornado, and lasted this way for 219 miles. During this time the tornado killed 695 people, which made it the Deadliest single tornado in US history.