Some of the most dramatic flooding in North Dakota was on Souris River which comes close to the Missouri but is not a tributary as it flows instead north into the Assiniboine River in Canada , which also experienced prior flooding . 10,000 people in Minot were evacuated on June 1 . On June 20 after they returned , officials announced that a new crest from new heavy rains would result in the river being a foot higher than the first crest . On June 21 , 12,000 people , a quarter of the town 's population , were ordered to evacuate after Lake Darling Dam had to step up its release of water . Amtrak suspended service on the Empire Builder through Minnesota , North Dakota and eastern Montana
flooding
2011 Assiniboine River flood
2011 Missouri River Flood