Once-Rare Mississippi River Flooding Now ‘More Frequent and More Severe’

Green Wire: When the Mississippi River spilled over its banks late last month in Mark Twain's boyhood home of Hannibal, Mo., it was the sort of flood the Army Corps of Engineers expects to occur once every 10 or 25 years. If Hannibal could only be so lucky. The town saw similar floods in 1995, 1996, 1998 and 2001. Worse still was the 200-year flood in 2008. But none of those compared to the devastation in 1993, when river gauges at Hannibal measured floodwaters at levels expected only once in five centuries.......

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