Houses damaged along the edge of Cougar Creek in Canmore, Canada. Widespread flooding caused by torrential rains washed out bridges and roads prompting the evacuation of thousands on Thursday. John Gibson/Getty Images hide caption

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In this Jan. 18 photo provided by the NYU Langone Medical Center, a technician examines mice to determine their health at the hospital's complex in New York. New York University/AP hide caption

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In Clarksville, Mo., Bob Bailey adjusts a pump as he tries to keep floodwater from the Mississippi River out of a rental property Sunday. The small community has worked for days to build a makeshift sandbag levee. Jeff Roberson/AP hide caption

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An Emergency Ministry soldier helps to repair religious icons in a church hit by flood water in the town of Nizhnebakansky, about 750 miles south of Moscow, on Tuesday. Sergey Ponomarev/AP hide caption

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A levee protects a home surrounded by floodwater from the Yazoo River near Vicksburg, Miss., May 18, 2011. Scott Olson/Getty Images hide caption

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