A flood is a natural disaster wherein an overabundance of water encroaches upon a given area of land where it is normally dry. While entirely natural in many areas, its impact on humans can range from mild to devastating, depending on severity and preparedness.
Floods have often affected both global and national history. According to Flood geologists, the Great Flood of Noah's time is responsible for much of the geology of the Earth's surface. The Johnstown flood of 1889 (also referred to locally as the "Great Flood" in reference to the biblical flood) did much to highlight dam safety (or lack thereof) in the United States. Flooding along the Mississippi River in 1993 caused millions of dollars in infrastructure damage and agricultural loss.
- Johnstown Flood Disaster - May 31, 1889 (English). The Library of Congress (2014). Retrieved on 16 December 2014. “On May 31, 1889, America suffered one of the greatest disasters in its history. A flood known as the Johnstown Flood or the Great Flood of 1889 destroyed the city of Johnstown, Pennsylvania.”
- The Great Flood Of 1993 (English). SWR (2001). Retrieved on 16 December 2014. “Hundreds of levees along the Mississippi and Missouri rivers failed back in 1993 causing the deaths of 50 people and damages between $15 and $20 billion dollars.”