The Great Dayton Flood of 1913 :
The storm began with 58 mph wind gusts on March 21, 1913.
Then on March 23, Easter Sunday, the rain began dumping 8 to 11 inches over a five-day period.
Two days later, with the Great Miami River rising nearly two feet an hour, the levees failed.
#MarchMadness
https://www.daytondailynews.com/news/the-great-dayton-flood-1913-things-know-about-broken-levees-rescue-boats-and-lost-lives/6MzhsTtAysABc4pFACBjpL/
If I am not mistaken, that was the largest natural disaster in U.S. history at the time.
