On March 18, 1925, the Tri-State Tornado tore through parts of Missouri, Illinois, and Indiana. It is considered the deadliest tornado in U.S. history, killing around 695 people. The tornado stayed on the ground for an exceptionally long distance, destroying towns and farms along its path. Communication and weather forecasting were limited at the time, which increased vulnerability. The disaster highlighted the need for better warning systems and emergency planning. Its memory still shapes how meteorologists and communities think about severe weather risk.
