Presently- flood stages along the Mississippi River are of the minor to moderate category from just above the mouth of the Ohio River near Cairo-IL all the way south into Louisiana. The Ohio River itself is in moderate to major flood in it's lower reaches.
The top of the levees on the Mississippi at New Orleans are 20 feet. The present crest forecast is now 17 feet on April 16.
That's at least 3 forecasted-significant storm systems away.
According to this Associated press dispatch- the U.S. Army Corps of Engineers have gone to 24/7 manning- "monitoring the levees" and the flood moving south along the lower Mississippi. There's a specially-built spillway the Corps can open- sending excess floodwater into nearby Lake Pontchartrain.
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