Missouri
Located in Tornado Alley, Missouri also receives extreme weather in the form of severe thunderstorms and tornadoes. The most recent tornado in the state to cause damage and casualties was the 2011 Joplin tornado, which destroyed roughly one-third of the city of Joplin. The tornado caused an estimated $1–3 billion in damages, killed 159 (+1 non-tornadic), and injured over 1,000 people. It was the first EF5 to hit the state since 1957 and the deadliest in the U.S. since 1947, making it the seventh deadliest tornado in American history and 27th deadliest in the world. St. Louis and its suburbs also have a history of experiencing particularly severe tornadoes, the most recent memorable one being an EF4 tornado that damaged Lambert-St. Louis International Airport on April 22, 2011. One of the worst tornadoes in American history struck St. Louis on May 27, 1896, killing at least 255 and causing $10 mil. damage ($3.9 bil. damage in 2009) or $ in today's dollars.
Tri-State Tornado
In all, at least 695 people died and 2,027 were injured, the majority in southern Illinois. Three states, 13 counties, and more than 19 communities, four of which were effectively effaced (several of these and other rural areas never recovered), were in the path of the record 3.5 hour duration tornado. Approximately 15,000 homes were destroyed by the Tri-State Tornado. Total damage was estimated at $16.5 million; adjusted for increases population/wealth and inflation the toll is approximately $1.4 billion (1997 USD), surpassed in history (through 2010) only by two extremely destructive tornadoes in the City of St. Louis in 1896 and 1927.