Climate change impacts on freshwater systems frequently exacerbate existing pressure, especially in locations already experiencing water scarcity , making water security a key risk  in small islands. Small islands are usually environments where demand for resources related to socioeconomic factors such as population growth, urbanisation and tourism already place increasing pressure on limited freshwater resources. In many small islands, water demand already exceeds supply. For example, in the Caribbean, Barbados is utilising close to 100% of its available water resources and St. Lucia has a water supply deficit of approximately 35% . On many Mediterranean islands, water demand regularly outstrips supply
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report