Climate change poses a major global challenge, significantly stressing waste management infrastructure in vulnerable coastal regions due to urbanization and climate-induced impacts. This chapter addresses the knowledge gap in climate-adaptive waste management by examining the critical relationship between climate change and existing solid waste and wastewater systems. Baseline conditions are established via the methodological approach, and findings indicate that conventional, centralized waste management approaches lack the flexibility to withstand climate-related disruptions. Building on these insights, multiple technologies tailored to be resilient to climate change impacts and to have minimal contribution to climate change are developed and tested. For solid waste, the developed in-vessel co-composting system has demonstrated an enhanced performance while recovering value-added products, as evidenced by successful implementation in Vichoor Village, Tamil Nadu (13.21°N and 80.27°E). In parallel, the present wastewater innovations, including hybrid zero liquid discharge systems, decentralized nature-based treatment techniques and in-stream treatment approaches, tailored to suit densely populated and space-constrained regions, exhibited promising results for climate-resilient operation. This research work contributes valuable knowledge to the emerging field of climate-adaptive infrastructure, demonstrating that decentralized, resource-recovery focused waste management systems offer practical pathways toward enhancing coastal resilience to climate change, while advancing circular economy principles. The technologies presented provide immediate implementable solutions while establishing a foundation for future scaled applications in vulnerable coastal regions worldwide.