Top 5 Worst floods in US history

The worst floods in US history occurred more than a century ago. Few of them were expected and most regions lacked an adequate warning system. Many of those floods had problems with stability which was noted and ignored. Here are the top 5 worst floods in US history:

1) Johnstown

On May 31, 1889, the South Fork Dam in Johnstown, Pennsylvania collapsed, leading to devastating flooding. The region had previously experienced heavy rains, which clogged the dam spillways.  There was more than $453 million in property damage, and an estimated 2209 people perished.

2) St. Francis Dam Failure

The St. Francis Dam was opened in 1926 after two years of construction. Not long after construction was complete, cracks began to form on the surface of the dam. It collapsed on March 12th, 1928, killing 431. 

3) Ohio River Flood

The 1937 flood of the Ohio River, left an estimated 350 people dead and nearly 1 Million homeless. Rains and flooding persisted for a solid month, from January 5-February 5.

4) Great Dayton Flood

The greatest natural disaster in Ohio’s history was the Great Dayton Flood, which killed 360 people,displaced 65,000 and destroyed tens of thousands of homes and businesses.

5) Great Mississippi Flood

The Great Flood of 1927, flooded the lower Mississippi River valley in April 1927.  It was one of the worst natural disasters in the history of the United States. More than 23,000 square miles of land was submerged, hundreds of thousands of people were displaced, and around 250 people died.The flooding impacted areas in Arkansas, Illinois, Kentucky, Louisiana, Mississippi, Missouri, Tennessee, Texas, Oklahoma and Kansas.

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