OMAHA, Neb. (AP) – Untreated wastewater is being released from an Omaha water station into the Missouri River. The city announced Sunday that it was closing isolation gates at the Monroe Street Lift Station as the river surged. The move will allow the release of some untreated wastewater.

Omaha’s Public Works department urges people to avoid wading or swimming in the river near the Veterans Memorial Bridge in south Omaha and for several miles downstream until further notice. Officials in Nebraska and Iowa have been monitoring the swollen river. Flood gates were installed Sunday at Lewis & Clark landing to keep water from seeping into downtown Omaha.

The river is expected to crest near Omaha at record levels between 30 and 35 feet in late June after more water is released from upstream reservoirs.