Dakota Dunes is about two miles north of Sioux City and sits right on the Missouri River.
Sheri Hendricks has spent a lot of time on the road lately.
She's been making the 90 minute trek to Dakota Dunes every day to help her brother move out his possessions.
"The water is slowly creeping up," she said. "First they told us it was only going to be up to the basement, now they're telling us its going to be all the way up."
Hendricks said her brother fully expects to lose his entire house.
Sheri doesn't know if her efforts will be successful.
"Apparently today they're not letting too many people through because they want to get the levees up and running," she said.
At Dakota Dunes, South Dakota there is a lot of activity and it is difficult to get in.
Those that are in are making a decision...whether to sandbag and hope for the best....or pack up and leave.
Helicopters are bring in sandbags and the National Guard has formed sandbagging crews.
A steady stream of trucks is filing in on the development's only road and dumping dirt at river's edge in effort to stem the tide.
Crews are fighting a battle against time.
Terry Vaughan lives on the high ground here and doesn't plan to leave.
He says many of his neighbors have little choice.
"You have to down here, you're crazy if you stay, You're going to get water, you're going to lose power," he said. "The water is on the ground and they're basements are right here so in the next day or so they're going to be getting it and its just going to be getting worse every day."
"This is going to be real bad...I mean everybody clear through the Dunes here is going to get water."
The water level here has risen several feet the past few days. Many made the decision to move their belongings out and sandbag their homes.
South Dakota State Troopers are monitoring who is allowed to enter the area.
Sheri Hendricks hopes she's one of them.
"We're hoping to get through...hopefully they won't lock us out today," she said.
Sioux City is also preparing for potential flood waters.
There was extensive sandbagging at the Hilton Garden Hotel along the city's downtown riverfront area.
At some points where Interstate 29 is close to the river, the water level is just below pavement grade.