Officials in Minnesota are issuing a warning to residents about the potential for an "imminent failure" of the Rapidan Dam. The dam is located near the city of Mankato, which is approximately 90 minutes away from Minneapolis. Mankato is home to a population of 45,000 people. The situation is being closely monitored by authorities as they work to address the potential risk posed by the dam. Residents in the area are advised to stay informed and prepared for any developments regarding the dam's condition.