Louisiana warns beachgoers of flesh-eating bacteria surge as Vibrio vulnificus cases spike

Along the Gulf Coast this summer, a microscopic inhabitant of warm, brackish waters is claiming lives at a pace that has alarmed Louisiana's public health officials. Nine people have contracted Vibrio vulnificus in 2026—five of them fatally—more than doubling the state's decade-long averages in a season that scientists increasingly link to warming seas and a shifting climate. The story is not only one of bacteria and beaches, but of how a changing environment quietly expands the boundaries of danger, and how quickly the familiar can become fatal.