An increasing number of adaptation responses exist for urban systems, but their feasibility and effectiveness is constrained by institutional, financial, and technological access and capacity, and depends on coordinated and contextually appropriate responses across physical, natural and social infrastructure . Globally, more financing is directed at physical infrastructure than natural and social infrastructure  and there is limited evidence of investment in the informal settlements hosting the most vulnerable urban residents . Ecosystem-based adaptation  has increasingly been applied in urban areas . Combined ecosystem-based and structural adaptation responses are being developed, and there is growing evidence of their potential to reduce adaptation costs and contribute to flood control, sanitation, water resources management, landslide prevention and coastal protection . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report