Climate change has emerged as one of the most significant global threats to public health infrastructure, challenging the capacity of health systems to prevent disease, manage emergencies, and protect vulnerable populations. Rising temperatures, extreme weather events, changing precipitation patterns, and sea-level rise have intensified the burden on healthcare services, leading to systemic disruptions across physical infrastructure, workforce capacity, supply chains, and the overall resilience of public health systems. The impacts are far-reaching, affecting both the immediate functioning of healthcare facilities and the long-term planning required to maintain public health security. Increasing global temperatures contribute directly to higher incidences of heat-related illnesses such as heatstroke, dehydration, and cardiovascular stress. Public health infrastructure must respond to surges in emergency cases during heatwaves, which strain hospital capacities and emergency services. Prolonged heat also affects the working conditions of health professionals, reducing their efficiency and increasing occupational health risks. At the same time, rising temperatures encourage the spread of vector-borne diseases like dengue, malaria, chikungunya, and Zika, necessitating expanded disease surveillance and vector control programs. Health systems that are already under-resourced often struggle to monitor, prevent, and manage these outbreaks, highlighting a major gap exacerbated by climate change. Extreme weather events—including cyclones, floods, droughts, and wildfires—pose immediate threats to health infrastructure by damaging hospitals, clinics, laboratories, and supply centers. Flooding can disrupt electricity, water supply, and sanitation systems, rendering facilities non-operational at precisely the time when they are needed most. Cyclones and storms often destroy roads and communication networks, delaying emergency response and hindering the transport of patients and medical supplies. Wildfires reduce air quality, increasing cases of respiratory illnesses such as asthma, chronic obstructive pulmonary disease, and acute lung injury, leading to a surge in hospital admissions. These events expose the fragility of critical health infrastructure and demonstrate the need for climate-resilient structural design, backup power systems, and disaster-responsive health planning. Water scarcity and contamination—driven by droughts, heavy rainfall, and rising sea levels—create additional burdens on public health systems. Reduced access to clean water increases the risk of waterborne diseases such as cholera, typhoid, and diarrheal infections, especially in low-income communities with limited