Climate change is increasingly recognized as a critical challenge that affects multiple aspects of society, with its impacts being both direct and indirect, sudden and gradual. One of the central concerns is how climate change complicates the process of vulnerability assessment across key sectors, such as human health, infrastructure, agriculture, and biodiversity. Vulnerability assessment refers to the systematic identification of the susceptibility of systems or populations to the adverse effects of climate variability and change. It involves evaluating exposure, sensitivity, and adaptive capacity. Climate change intensifies these assessments because the environmental, social, and economic factors that influence vulnerability are themselves in flux, often in unpredictable ways. In the realm of human health, climate change affects vulnerability through a variety of pathways. Rising temperatures, for instance, increase the frequency and severity of heatwaves, which can result in heat-related illnesses and mortality, particularly among the elderly, children, and those with pre-existing medical conditions. The spread of vector-borne diseases, such as malaria, dengue, and Zika virus, is also influenced by changing climatic conditions. Warmer temperatures and altered precipitation patterns expand the habitable range of mosquitoes and other disease vectors, making populations in previously unaffected regions vulnerable. Additionally, extreme weather events such as floods, storms, and hurricanes can damage health infrastructure, limit access to medical care, and lead to the displacement of communities, exacerbating both short-term and long-term health risks. Vulnerability assessment in human health thus becomes more complex as it must account for overlapping stressors, demographic variables, socio-economic disparities, and the dynamic nature of disease transmission under changing climatic conditions. Infrastructure is another sector profoundly affected by climate change. Physical infrastructure, including roads, bridges, dams, and energy systems, is highly sensitive to environmental stressors. Increasingly frequent and intense weather events challenge the design parameters and resilience of these systems. For example, heavy rainfall and flooding can erode foundations, compromise structural integrity, and disrupt transportation networks. Rising sea levels threaten coastal infrastructure, including ports, water treatment plants, and residential areas, by increasing the risk of inundation and saltwater intrusion. Vulnerability assessment in this context requires a multi-dimensional approach, evaluating not only the probability of exposure to climate hazards but also the resilience of materials, engineering standards, maintenance regimes, and the interconnectedness of infrastructure networks. Assessing vulnerability becomes particularly complex when considering cascading failures, where the disruption of one system, such as electricity, can have far-reaching consequences for water supply, healthcare, and communication systems. Agriculture, as a sector directly dependent on climate conditions, faces acute challenges in vulnerability assessment under changing climate scenarios. Crop yields are highly sensitive to variations in temperature, precipitation, and the frequency of extreme events like droughts and floods. Rising temperatures can accelerate plant development but may reduce the duration of critical growth stages, leading to decreased yields. Changes in precipitation patterns can result in water stress or flooding, affecting soil fertility and crop productivity. Additionally, climate change influences the prevalence of pests, pathogens, and invasive species, further threatening agricultural systems. Vulnerability assessment in agriculture must consider not only climatic variables but also socio-economic factors such as farm size, access to irrigation and technology, market dynamics, and policy support. The adaptive capacity of farmers, including knowledge of climate-smart practices and access to insurance or financial resources, also plays a crucial role in determining vulnerability. This sector exemplifies the complexity of integrating biophysical, technological, and social dimensions in climate vulnerability assessments. Biodiversity is highly sensitive to climate change, as species and ecosystems depend on specific climatic conditions for survival. Shifts in temperature, precipitation, and extreme weather events can disrupt phenology, migration patterns, and reproductive cycles. Some