ERWIN, Tenn. — Rescue workers in Tennessee said Friday they have recovered the body of the last person still missing after massive flooding from Hurricane Helene hit a plastic factory There.

Rosa Andrade, 29, was one of six employees killed after they failed to escape the rising waters around Impact Plastics in Erwin, a small town in eastern Tennessee. Surviving workers said they were not allowed to leave until water flooded the plant’s parking lot and power was cut. Eleven people were swept away and only five were saved.

Unicoi County Search and Rescue Capt. Andrew Harris said emergency workers discovered Andrade’s body Wednesday, more than a month after the Sept. 27 flood. Nolichucky River.

Normally 2 feet (61 centimeters) deep, the river rose to a record 30 feet (9.1 meters) that day, with more than 1.4 million gallons (5.3 million litres) of water flowing downstream every second – twice that of Niagara Falls.

Relatives of some of those who were killed have sued Impact Plastics and its owner, Gerald O’Connor. Among them is the family of Johnny Peterson, who was able to climb into the bed of a semi-trailer that was trying to escape the area and send text messages to his family before he was taken away.

The Tennessee Bureau of Investigation is investigating allegations involving Impact Plastics at the direction of the local prosecutor. The state Office of Occupational Safety has also opened its own investigation into the circumstances behind the death.

O’Connor said no employees were forced to continue working and they were evacuated at least 45 minutes before the massive force of the flood hit the industrial park.

The workers who died were among more than 200 people killed by Helene in remote towns throughout the Appalachians. It was the deadliest hurricane to hit the continental US since Katrina in 2005. The storm also left millions without power, knockout cell service and destroyed drinking water systems.