United Hospital in Grand Forks, N.D., remained closed throughout last week due to the devastating Red River flood.
The town's sole acute-care facility was spared from flood waters but will remain closed until water and sewage systems are restored.
About 50 hospital employees remained at United last week, according to the Grand Forks Herald.
Early in the week, Air Force members built a dike in front of the 277-bed facility to keep flood waters away, but a shortage of drinking water forced the evacuation of more than 500 hospital patients and residents of a nearby nursing home and residential elder-care facilities to other sites in North Dakota, Iowa and Minnesota.
United set up a 20-bed mobile surgery unit at Grand Forks Air Force Base.
In Wahpeton, N.D., volunteers stacked 14,000 sandbags to protect a clinic owned by Fargo-based MeritCare Health System.