The flooding Missouri River has damaged dozens of buildings at an Air Force base in Nebraska. The Omaha World-Herald reports that about one-third of the Offutt Air Force Base is under water. A spokeswoman for the base says 60 buildings, mostly on the south end of the base, have been damaged, including about 30 completely inundated with as much as 8 feet of water. Among the buildings badly damaged are the headquarters building and a hangar.

Offutt’s lone runway is expected to remain closed until Tuesday afternoon. Airmen had been filling thousands of sandbags, but the newspaper reports that the sandbagging effort has been halted.

Residents in parts of southwestern Iowa were forced out of their homes Sunday as a torrent of Missouri River water flowed over and through levees. Heavy rainfall and snowmelt have led to dangerously high water in creeks and rivers across several Midwestern states, with the Missouri River hitting record-high levels in many areas. At least two deaths were blamed on flooding, and two other men have been missing for days. While river depths were starting to level off in parts of Nebraska on Sunday, the water is so high in many places that serious flooding is expected to remain for several days. And downstream communities in Kansas and Missouri were bracing for likely flooding.

In Iowa, the Missouri River reached 30.2 feet Sunday in Fremont County in the state’s far southwestern corner, 2 feet above the record set in 2011. People in the towns of Bartlett and Thurman were being evacuated as levees were breached and overtopped.

County Emergency Management Director Mike Crecelius said it wasn’t just the amount of the water, it was the swiftness of the current that created a danger. “This wasn’t a gradual rise,” Crecelius said. “It’s flowing fast and it’s open country — there’s nothing there to slow it down.” Thurman has about 200 residents. About 50 people live in Bartlett.

Lucinda Parker of Iowa Homeland Security & Emergency Management said nearly 2,000 people have been evacuated at eight Iowa locations since flooding began late last week. Most were staying with friends or family. Seven shelters set up for flood victims held just a couple dozen people Saturday night.