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The heavy rain may cause the southernmost, river-adjacent segment of Hamilton Boulevard to flood.
Sioux City Fire Prevention says the National Weather Service's Missouri River forecast of 29.4 feet could be enough to inundate Hamilton Boulevard near the Interstate 29 interchange.
The Iowa Department of Transportation says it will detour routes if the road is closed. If Hamilton Boulevard closes, it would be the second time since March that Missouri River flooding put the roadway out of service.
Releases have been increased this week at Gavins Point Dam near Yankton, South Dakota.
As a precaution downstream, the Dakota Dunes Community Improvement District is asking residents and businesses to lower water and sewer use. They also want people to plug all lower level drain pipes to keep sewers from backing up in basements.
Some residents are facing evacuations amid new flooding along the Nebraska-Iowa border just weeks after thousands of people in the region were forced from their homes because of flooding.
Rural and riverside residents along the Missouri River in Mills County, Iowa, were preparing this week to evacuate, the Omaha World-Herald reported today. In Nebraska, along the Platte River, residents around Hanson Lakes just south of Bellevue were sandbagging a levee that was already being overtopped by the river.
In Hamburg, Iowa, residents, and farmers were again scrambling to shore up a levee and add about 3 feet to its height to hold back water from the Missouri River. It's a scramble that local residents have repeated over the years to try to protect the town of about 1,000 people near the Missouri state line.
