Floodwater from the Souris River surrounds homes in Burlington, N.D., on Monday. Charles Rex Arbogast/AP hide caption

itoggle caption Charles Rex Arbogast/AP

Businesses are surrounded by floodwater as the Souris River crests Sunday in Minot, N.D. The river surpassed its 1881 record level of 1,558 feet above sea level, flooding an estimated 4,000 homes in Minot. Scott Olson /Getty Images hide caption

itoggle caption Scott Olson /Getty Images

A wheat field is inundated with floodwater near Vicksburg, Miss. The Mississippi River at Vicksburg is expected to crest at a record level Thursday. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

Mississippi floodwaters creep up the Old Train Depot and flood walls of downtown Vicksburg, Miss., on Friday. Rogelio V. Solis/AP hide caption

itoggle caption Rogelio V. Solis/AP