On a recent episode of The AquaDiary Podcast, environmental scientist Ally Berry explains atmospheric rivers — massive corridors of water vapor that can deliver beneficial rain and snow or trigger destructive flooding. The episode breaks down how scientists measure and rate atmospheric rivers, why they are critical to the West Coast’s water supply and how El Niño could influence where they develop and their impacts in 2026. The discussion also explores the risks for the East Coast, South and Midwest, along with the role climate change is playing in these powerful weather systems.


