Any systematic change in long-term statistics of climate elements (such as temp, rainfall, pressure or winds) sustained over several decades or longer. Climate change can aggravate freshwater systems, which are already stressed due to increases in population and rising water demand in various sectors, changing economic activity, alterations in land use, and urbanization. To ensure proper management of water resources, various strategies should be adopted based on water availability and water demand depending on the different needs at local, regional, and continental levels. Some of the strategies include water conservation, improved water use efficiency by recycling water, development of water markets and implementation of virtual water trade, and improved storage facilities to act as lifelines during drought periods. There is also a need to improve decision making based on the efficient modeling of climate change related to the hydrologic cycle through a better understanding of the uncertainties likely to exacerbate the impacts of climate change.