Are Flood Levels in U.S. Midwest 5 Feet Too Low?

Motorists are stranded along I-45 along North Main in Houston after storms flooded the area, Tuesday, May 26, 2015. (Cody Duty/Houston Chronicle via AP)
Motorists are stranded along I-45 along North Main in Houston after storms flooded the area, Tuesday, May 26, 2015. (Cody Duty/Houston Chronicle via AP)

Federal agencies may be underestimating historic 100-year flood levels on rivers in the midwestern United States by as much as five feet, a new study...

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