Residents were allowed to return to their homes at around 11:20 p.m. after the controlled flush was complete. They were evacuated for about five hours.
Cedric E. Dixon, 35, pleaded guilty to four counts each of involuntary manslaughter and second-degree assault and one count of leaving the scene of a crash.
The company in a post to its website said it has cancelled all future cruises and instructed guests with now-cancelled trips already booked to apply for a refund.