Hundreds of people are still missing and nearly a million homes are without power a week after the storm tore across the US south-east.

The storm surge, wind damage and inland flooding from Hurricane Helene have been catastrophic, flooding neighborhoods, stranding residents and destroying homes in Florida, Georgia, South Carolina, North Carolina, Virginia and Tennessee. At least 189 people have been killed, according to The Associated Press.

Excess deaths” caused by indirect effects of a storm can contribute to its overall death toll for 15 years, according to new research.