The convergence of El Niño and a prolonged marine heat wave poses risks to both weather patterns and marine ecosystems. Southern California could experience increased rainfall, potentially leading to flooding and mudslides, as seen in past strong El Niño events. However, the exact precipitation levels remain uncertain. Marine ecosystems are particularly vulnerable, as warmer waters reduce productivity at the base of the food web, impacting fish, birds, and marine mammals. Prolonged exposure to elevated temperatures could exacerbate food scarcity for these species, with unknown long-term effects. Coastal erosion and storm surges are additional concerns, especially if El Niño strengthens significantly.