Source: National Oceanic and Atmospheric Administration/National Weather Service/File
4. Xenia, Ohio, 1974 – $1.1 billion
Dozens of tornadoes touched down across Ohio, Indiana, and Kentucky during the “1974 super outbreak.” The tornadoes caused 159 fatalities and injured 4,145 people on April 3 and 4. The worst of the tornadoes, which bulldozed Xenia, Ohio, killed more than 30 people and injured 1,100. The twister destroyed more than 1,000 homes in the area.