Freshwater resources in Asia, which include both surface water and groundwater, are considerably strained, and changing climate is likely to act as a major stress multiplier . In Southern and Eastern Asia  nearly 200 million people are at risk of serious water- stressed conditions. Effective mitigation might reduce the additional population under threat by 30% , but still there is a 50% chance that 100 million people across SEA might face a 50% increase in water stress and a 10% chance that water stress will almost double in the absence of wide-ranging, multi-scalar adaptive measures . With Millennium Development Goal 7c, which aimed to halve the population that had no sustainable access to water and basic sanitation before 2015, not having been fully realised, and Sustainable Development Goal 6 on water and sanitation not having been effectively operationalised, the water stress is likely to increase by the end of 2030 .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report