At least 64 people have died as a result of Hurricane Helene, which has caused billions of dollars worth of damage as it rips across a wide swath of the southeastern US.

In a Saturday update on Helene, the National Hurricane Center said that “catastrophic and historic flooding” would continue over portions of the Southern Appalachians, though the risk for additional heavy rainfall was continuing to decrease.

The storm, now classified a post-tropical cyclone, is expected to hover over the Tennessee Valley on Saturday and into Sunday, the NHC added. Millions have been left without power after power lines and cell towers were damaged.

Among the people killed in the storm were three firefighters, a woman and her 1-month-old twins, and an 89-year-old woman whose house was struck by a falling tree, according to an Associated Press tally.

Helene blew ashore in Florida’s Big Bend region as a Category 4 hurricane late Thursday packing winds of 140mph and then quickly moved through Georgia, the Carolinas and Tennessee, uprooting trees, splintering homes and sending creeks and rivers over their banks and straining dams.

Preliminarily estimates put the total damage and economic loss from Helene at between $95bn and $110bn, according to AccuWeather.