(CNN) -- Rain forecast for Sunday could add to flooding woes along the Red River in Minnesota and North Dakota, where recreational boating was barred in several counties.
The river, which forms the border between the two states, is expected to crest at near 40 feet in Fargo, North Dakota, early Sunday, according to the National Weather Service. The temporary levee there is about 44 feet.
The river is expected to run high for the next several days.
The region usually has seasonal flooding after warm weather and rain melt snow in early spring.
Officials in Moorhead, Minnesota, across the border from Fargo, also were coping with the flooding, a repeat from 2010 and 2009. The Red River crested at nearly 41 feet in 2009.
U.S. Sen. Amy Klobuchar talked Saturday about improved levees and preparations.
Still, she said, three people have died in Minnesota because of the flooding.
"This is a ferocious river," Klobuchar said. "We have to continue to be careful."
Other Minnesota officials talked about the need for more flood mitigation.
The U.S. Coast Guard banned recreational boat traffic in several North Dakota counties.
In Cass County, north of Fargo, residents placed sandbags along flooded streams and roads and used all-terrain vehicles to reach their homes.