This month marks the anniversary of the worst flood in recorded history on the Mississippi River in spring of 1927. It is estimated that more than 630,000 people were displaced by the flood water, which covered 27,000 square miles to a depth of up to 30 feet. The Earth Science Picture of the Day post on Facebook today posted the picture below to recall the event, along with a brief summary and links to some other resources. You can find it at https://epod.usra.edu/blog/2016/04/archive-great-mississippi-flood-of-1927.html. Wikipedia also has a good summary at https://en.wikipedia.org/wiki/Great_Mississippi_Flood_of_1927.
