The Corps of Engineers warns communities along the Missouri River to expect flooding in mid-June.
The Corps is releasing more water from upstream reservoirs to relieve high levels caused by rain and heavy snowpack. The flow rate past Saint Joseph could double in the next two weeks, putting extra pressure on levees.
Holt County has activated its emergency shelter and is advising residents to evacuate low-lying areas.
Buchanan County has ordered an extra 100,000 sandbags.