The Mississippi River overflows its banks Tuesday, June 17, 2008, in Burlington, Iowa. The federal government predicts that 27 levees could potentially overflow along the river if the weather forecast is on the mark and a massive sandbagging effort fails to raise the level of the levees.
Iowa National Guard Staff Sgt. Chris Hartl looks over the edge of a sandbag levee at the overflow of the Mississippi River near Kingston, Iowa, Tuesday, June 17, 2008.
A line on a fire hydrant shows the high water mark along the Mississippi River Tuesday, June 17, 2008, in Burlington, Iowa. Flood waters receded several inches after a levee break across the river in Illinois caused river levels to drop Tuesday morning.
A sign outside the Iowa Welcome Center is partially submerged in floodwater from the Mississippi River Sunday, June 15, 2008, in Burlington, Iowa. Receding water on Sunday revealed the widespread damage caused by a record flood crest, while other Iowa cities faced rivers that were still rising. Burlington is expecting a flood crest in the Mississippi River within the next couple of days.
Russ Ogden watches over pumps that are keeping water out of his mother Dolores Ogden's home in Davenport, Iowa, Sunday, June 15, 2008. Family members built a wall around the home, where Dolores has lived since 1951, and removed the furnace and water heater.
As hail and rain pounds down, Russ Kozak of New London, Iowa, transports a load of sandbags up the Mississippi River to a team of sandbaggers reinforcing the river levee that protects the town of Gulfport, Ill., Sunday, June 15, 2008. Muddy conditions and approaching water made it necessary for boats to help deliver sandbags. The river is expected to rise another two feet by Wednesday in Gulfport and Burlington, Iowa.
Visitors to Burlington's riverfront district stand along the edge of a flooded Front Street Sunday, June 15, 2008, in Burlinigton, Iowa.
Burlington resident Scott Coleman, left, throws a sandbag to Ryan Mullenix, second from right, as Derek Reverend, center, holds the boat steady while the three helped in efforts to keep water out of Memorial Auditorium which sits on the edge of the Mississippi River Sunday, June 15, 2008, in Burlington, Iowa.
Ryan Mullenix of Burlington, Iowa, reaches out to catch a sandbag as city employee Lynda Gaddis looks on while helping to lay down a water barrier around Memorial Auditorium which sits at the edge of the Mississippi River Sunday, June 15, 2008 in Burlington, Iowa.
A "No Fires" warning sign is surrounded by floodwaters at a campground near Quincy, Ill., Sunday, June 15, 2008. While flooding around the Midwest is more serious in Iowa and parts of Wisconsin, the water is rising in Illinois and more water is on the way. The Mississippi River is closed to barge traffic due to flood conditions that have destroyed homes and thousands of acres of corn and soybeans.
Burlington residents take a break from sandbagging and moving equipment out of buildings in danger of being flooded by a Mississippi River that has already spilled over its banks Sunday, June 15, 2008, in Burlington, Iowa.
Corps of Engineers employees use a tractor to survey the flooding basement of Lock and Dam No. 21, which is overcome with the rising waters from the Mississippi River near Quincy, Ill., Sunday, June 15, 2008.
Russell Lowe builds a sandbag wall near River Drive and Credit Island in Davenport, Iowa, Sunday, June 15, 2008.
A power company truck is pictured in floodwaters in Coralville, Iowa, Sunday, June 15, 2008.
City Councilman Mark Huston, left, and public works employee Fred Lukavsky walk up the bridge along state highway 92 after inspecting the water level from a flooded plain along the Iowa River just below the confluence of the Cedar River and Iowa River Sunday, June 15, 2008, in Columbus Junction, Iowa. Water levels in the area dropped throughout the morning but were expected to crest again later in the evening.
Rod Lehnertz, left, director of planning, design and construction at the University of Iowa, and Sally Mason, right, president of the University of Iowa, stand next to a wall of sandbags helping to keep the Iowa River out of campus buildings in Iowa City, Iowa, Sunday, June 15, 2008.
In addition to floodwater, this apartment building has had a portion of a tree fall onto a balcony, in Coralville, Iowa, Sunday, June 15, 2008.
A statue is partially submerged outside a futon store on a flooded street in Coralville, Iowa, Sunday, June 15, 2008.
Heather Frees looks at the raging water flowing underneath the Burlington Street Bridge, Sunday June 15, 2008, in Iowa City, Iowa. The Iowa River was expected to crest at record levels sometime in the next 48 hours.
Maintenance workers re-position hoses as they try to stay ahead of water filling a utility tunnel next to the Linquist Center, Sunday June 15, 2008, in Iowa City, Iowa.