Sometime tonight the US Army Corps of Engineers will blow up a levee at the confluence of the Mississippi and Ohio Rivers.
All that rain that fell in April has both rivers swollen WAY past flood stage. (Water levels outside Cairo, Illinois, were at 61.4' this afternoon; "flood stage" begins at 40'.)
Major General Michael Walsh, head of the Mississippi River Commission,
"...ordered the intentional breach to alleviate pressure in the river system and to protect Cairo, even though it may lead to the flooding of 130,000 acres of mostly farmland in Missouri."