"Record Flood Stage. This stage last occurred in April of 1791 according to Tennessee Valley Authority records. Catastrophic flooding of the Swannanoa River Valley is likely," the National Water Prediction Service posted on the river gauge's website.

The death toll from Helene climbed as emergency responders rushed to rescue residents in small mountain towns that have been cut off from communication.

With efforts underway to repair the destruction left in the wake of Helene, here's what the NWS says about flooding, rainfall, more.