See continuing coverage of the flooding in our slideshow.

Eric Keith / AP
This aerial photograph taken near the Iowa/Missouri state line shows floodwaters mixed with sediment water on Wednesday, June 29, 2011. The Missouri River has been rising for weeks because of heavy rains and snow melt along the river's headwaters, forcing the U.S. Army Corps of Engineers to open flood gates, sending massive amounts of water downstream along the Missouri River system.

