The Union County Emergency Management said that residents along the Missouri River should try to secure their property and prepare to evacuate.
Due to excessive water from rain, snowmelt, and the collapse of the Spencer Dam on the Niobrara River releases at Gavins Point Dam near Yankton, South Dakota were temporarily increased to 100,000 cubic feet per second before being lowered to 90,000.
Due to the excess water, the Missouri River is expected to reach 1092-1093 feet in the Dakota Dunes area and 1096-1097 in the Wynstone area. Additionally, the Missouri River is expected to crest at 30.8 feet in Sioux City and 32.9 feet on the Big Sioux River. Due to the high water evaluations, they say that water from the Missouri River may reach low lying areas.
They say that residents in Dakota Dunes, Riverland Estates, Wynstone, and other rural residences to secure their property and prepare to voluntarily evacuate. For those that do evacuate, the American Red Cross set up a shelter at West Middle School at 3301 West 19th Street in Sioux City.
With flooding events changing constantly, they say that additional measures may be taken. People can stay up-to-date by following the Union County Sheriff’s Office Facebook page, the Union County website, or by staying with KCAU 9 as we work to give you that latest updates.