The Great Flood of 1993 (or Great Mississippi and Missouri Rivers Flood of 1993) was a flood that occurred in the Midwestern United States, along the Mississippi and Missouri rivers and their tributaries, from April to October 1993.
The flood is among the most costly and devastating to ever occur in the United States, with 50 dead and US$12–16 billion in damages (equivalent to $23–31 billion in 2024). The hydrographic basin affected an area approximately totaling 320,000 square miles (830,000 km), of about 745 miles (1,199 km) in length and about 435 miles (700 km) in width. Within this zone, the flooded area totaled around 30,000 square miles (78,000 km) and was the worst such U.S. disaster since the Great Mississippi Flood of 1927, as measured by duration, area inundated, persons displaced, crop and property damage, and number of record river levels. In some categories, the 1993 flood even surpassed the 1927 flood, at the time the largest flood ever recorded on the Mississippi River.
