The 2026-27 El Niño is expected to exacerbate existing global challenges, including food insecurity, water shortages, and health crises. Vulnerable populations in developing nations, particularly in Africa, Asia, and Latin America, face heightened risks of disease outbreaks, malnutrition, and displacement. Ecosystems such as coral reefs and rainforests are also at risk, with potential mass bleaching and severe droughts threatening biodiversity and carbon storage. Economic impacts could be severe, with disruptions to agriculture, fisheries, and energy systems likely to result in long-term financial losses.