The health risks associated with El Niño-induced heatwaves are significant, particularly for older adults and individuals with pre-existing conditions. Dehydration and heat-related illnesses, such as heatstroke, can lead to severe complications, including organ damage. Those with heart, lung, or kidney diseases may experience worsening symptoms due to the strain caused by extreme heat. The risks are amplified in regions with limited access to healthcare or cooling infrastructure, making it crucial to address these vulnerabilities proactively.