The health impacts of climate change are most severe in regions with weak health infrastructure, particularly in developing countries. Vulnerable groups, including children, the elderly, and low-income communities, face heightened risks from extreme weather, food insecurity, and waterborne diseases. Rising temperatures and changing precipitation patterns are exacerbating the spread of diseases like malaria and dengue. Mental health issues, such as anxiety and post-traumatic stress, are also increasing due to climate-related displacement and disasters. Without significant intervention, these health challenges will worsen, undermining decades of progress in global health and widening inequalities.