El Niño's impacts are expected to vary across regions. The Pacific Northwest may face exacerbated drought conditions due to reduced precipitation and warmer temperatures, while southern states could experience heightened flooding risks from increased rainfall. Marine ecosystems are also at risk, with potential decreases in plankton populations, harmful algal blooms, and disruptions to the food web. Past events have led to significant die-offs of marine species, including seals, sea lions, and seabirds, as well as economic losses from fisheries closures. The warming trend may also attract unusual marine species, such as tropical fish and sharks, to coastal areas, potentially affecting local biodiversity and human activities.