The cab of a pickup truck peeks out of floodwaters Wednesday, March 20, 2019, in Hamburg, Iowa. As some communities along the Missouri River start to shift their focus to flood recovery after a late-winter storm, residents in two Iowa cities are still in crisis mode because their treatment plants have shut down and they lack fresh water.

This March 11, 2019 photo shows a makeshift levee built by a resident in Rolling Fork, Miss., to protect his home from flood waters. In March 2019, scientists are warning that historic flooding could soon deluge parts of several southern states along the lower Mississippi River, where flood waters could persist for several weeks.

Henderson firefighters put the finishing touches on a floodwall across Highway 19 Wednesday, March 20, 2019, in Henderson, Minn.

Students and teachers from Minnesota New Country School in Henderson, Minn., help stack sandbags on a pallet Wednesday, March 20, 2019.

From left, Ethan Perez, Keith Pfeifer and Ean Pennell, 3, are evacuated from their residences in Manitowoc, Wis., by firefighters Kevin Fabian, left, and Garrett Grissom, right, after an ice jam on the Manitowoc River flooded the block Thursday, March 21, 2019. (Joshua Clark/The Post-Crescent via AP)

Treyton Gubser, left, and his uncle Daniel Gubser paddleusing shovels through the floodwaters after they rescued Daniel's kid's cat, Bob Wednesday, March 20, 2019, in Hamburg, Iowa. As some communities along the Missouri River start to shift their focus to flood recovery after a late-winter storm, residents in two Iowa cities are still in crisis mode because their treatment plants have shut down and they lack fresh water.

This Wednesday, March 20, 2019 aerial photo shows flooding near the Platte River in in Plattsmouth, Neb., south of Omaha. The National Weather Service is warning that flooding in parts of South Dakota and northern Iowa could soon reach historic levels. A Weather Service hydrologist says "major and perhaps historic" flooding is possible later this month at some spots on the Big Sioux and James rivers. The worst of the flooding so far has been in Nebraska, southwestern Iowa and northwestern Missouri.

This Wednesday, March 20, 2019 aerial photo shows flooding near the Platte River in in Plattsmouth, Neb., south of Omaha. The National Weather Service is warning that flooding in parts of South Dakota and northern Iowa could soon reach historic levels. A Weather Service hydrologist says "major and perhaps historic" flooding is possible later this month at some spots on the Big Sioux and James rivers. The worst of the flooding so far has been in Nebraska, southwestern Iowa and northwestern Missouri.

In this Wednesday, March 20, 2019 photo provided by the Missouri State Highway Patrol shows Water Patrol Troopers assisting utility company employees in shutting off natural gas lines in flood waters at Craig, Mo. In northwest Missouri, a levee breached Tuesday, unleashed a torrent that overwhelmed a temporary berm that was built up with excavators and sandbags to protect the small town of Craig, where the 220 residents have been ordered to evacuate. "They've got water running down Main Street," said Tom Bullock, emergency management director of Holt County, where Craig is located.

Water flows across State Highway 93 south of Henderson Wednesday, March 20, 2019. Three of the four highways leading into the town are closed because of flooding.

In this March 14, 2019, photo, men go to check on cabins at River Resort near Yutan, Neb. A late-winter storm system continued its trek across the Midwest, sending rain and snow into Minnesota and Illinois after leaving devastating flooding in parts of eastern Nebraska and Iowa.