Global assessments identify Asia as the most exposed region to SLR  in terms of the number of people living in low- elevation coastal zones and the number of people exposed to flooding from 1-in-100-years storm surge events . Twelve of the top 20 countries exposed to SLR and associated flood events are in Asia, and of these, China, India, Bangladesh, Indonesia and Vietnam are estimated to have the highest total coastal population exposure . Critically, regardless of the emissions scenario, 70% of the global population exposed to SLR and land subsidence are in eight Asian countries: China, Bangladesh, India, Vietnam, Indonesia, Thailand, the Philippines and Japan . This is particularly worrisome since in highly populated low-lying coastal cities across Asia, it is estimated that land subsidence could be as influential as climate-induced SLR over the 21st century . In East Asia and the Asia-Pacific in general , without adaptation, 1 million people  are projected to be affected by submergence under RCP8.5 by 2095. Limiting warming will reduce this risk, and under RCP4.5, these numbers of people at risk will be reached by 2140. However, continuing on RCP8.5 increases risk exposure to 7 million  . Notably, assuming present-day population and adaptation , East and South Asia already have a large number of people at risk of a 1-in-100-years flooding event  because of relatively lower flood protection .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report