A strong El Niño increases the likelihood of wetter conditions, particularly in Southern California, but does not guarantee a wet winter. Atmospheric rivers could bring heavy rainfall, which may overwhelm drainage systems, trigger mudslides, and cause coastal flooding. For boaters, increased runoff and debris in coastal waters, along with dangerous seas and high surf, are potential hazards. While the rain could benefit California's water supply and ecosystems, the intensity and timing of storms will determine whether the impacts are beneficial or destructive (Harbor News, 2026-08-30).