Fed by Helene's moisture, a predecessor rain event in the Southern Appalachians prior to the hurricane's landfall caused record rainfall and flooding in September 2024. Increased humidity due to global warming likely boosted rainfall totals. Read more: https://t.co/qAtjqC19gj https://t.co/s3SGf7H7NZ NOAA Climate.gov Climate Change Science on Telegram by @ClimateChangeScience A @grttme project - Other backups: @Hallotme