DATE: May through September 1993
LOCATION: Illinois, Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, South Dakota, Wisconsin
DEATHS: 47 Estimated
COST: nearly $30 billion*
WHAT HAPPENED: Sustained rainfall generated exceptional flood levels throughout the region. Hundreds of levees were breached along the Mississippi and Missouri rivers, and 70,000 homes were damaged, many in areas that people assumed to be safe.
*All costs estimated in 2009 dollars.