Climate change has turned up into a serious problem of current century and will intensify water-related issues in densely populated developed cities. The new pathway from every climate change model is for limiting the global warming to 1.5 °C level dependent on reductions in greenhouse gases (GHG). The GHG are increasing particularly in urban areas like Chennai city located in Southern part of India poses a serious climate change-related threats. This review addresses about the climate change mitigation measures for water conservation and management. The sustainable water conservation practices and management in Chennai city are analyzed to find the suitable mitigation techniques under climate change. The new sustainable development methods can be suggested by considering the following innovative technologies based on renewable energy sources, rainwater harvesting, underground water storages, wastewater reuse, two pipeline system for fresh and treated wastewater usage, climate resilient buildings, etc.