The 10 most destructive tornadoes in U.S. history span 131 years and 10states (Missouri, Illinois, Indiana, Texas, Georgia, Mississippi, Kansas, Oklahoma, Louisiana, and Wisconsin). The worst of these tornadoes (The Tri-State Tornado of 1925) traveled 219 miles and killed about 690 people across three states.
Take tornado warnings seriously. Learn what to do in a tornado, and do it without delay when the warnings are sounded.