Hurricane Helene caused deadly and destructive flooding when it swept through the Southeast on Sept. 26–29, 2024. Across a broad swath of western North Carolina, where the worst flooding occurred, the amount of rainfall exceeded levels that would be expected on average only once every 1,000 years. Hurricane Helene caused deadly and destructive flooding when it swept through the Southeast on Sept. 26–29, 2024. Across a broad swath of western North Carolina, where the worst flooding occurred, the amount of rainfall exceeded levels that would be expected on average only once every 1,000 years. Environment Phys.org – latest science and technology news stories