After engineers opened the Morganza spillway Saturday in an attempt to divert surging floodwaters from heavily populated areas in New Orleans and Baton Rouge, Google and GeoEye released some before and after satellite photos Monday evening.

May 10

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The Mighty Mississippi

The Mississippi River crested at 47.8 feet at Memphis on Tuesday, just short of the 1937 record. The waters have engulfed riverbanks in Tennessee, Arkansas, Missouri, Illinois, Mississippi, and Louisiana, prompting the U.S. Army Corps of Engineers to open floodgates,…