The river sits against the levy less than a block away from Darlene Conner's house in the northwest part of town near the Bob Kerrey Pedestrian Bridge. If the levy fails, the entire neighborhood would be flooded.
"I think if that water gets up pretty high on the dike, it's going to put a lot of pressure on that," said Conner. "And this is what [the Corps of Engineers] said. They don't know for sure. They're going to hope that nothing happens."
Darlene's husband Don has a lot of things in the garage he doesn't want to lose in a flood, including his 1936 Ford Coupe he restored himself.
"Took me six years to do it," said Don Conner. "It's just one of my pride and joy and toys."
Verena Gibbs lives a couple blocks away from the Conners and has her car full of her most important possessions just in case she has to evacuate.
But she is staying as long as she can.
"I'm prepared," said Gibbs. "But at the same time I'm saying that I'm not going anywhere. It sounds like I'm wavering, but I'm not. Because I'm trusting that the Lord is going to see us through this."
While the Conners move their stuff to higher ground, a lot of their neighbors are already gone.
"We like it down here," Darlene Conner said. "It's quiet. But now it's too quiet."