Tunica, Mississippi (CNN) -- An agonizing three weeks await the residents of three southern states as a historic flood crest slowly worked its way downstream Thursday toward New Orleans along the Mississippi River. The floodwaters that have already inundated tens of thousands of acres of Missouri farmland and lapped at downtown Memphis, Tennessee, are now on a steady, soggy march through Arkansas, Mississippi and Louisiana.
Flooding also continues to be a problem in southeastern Missouri and southern Illinois, though the Mississippi and Ohio rivers have already crested in those states.
Gov. Bobby Jindal advised residents in southeastern Louisiana Wednesday to evacuate their homes ahead of the anticipated opening of a spillway designed to divert the impending crest around the Crescent City.
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