Critically, these projections of higher temperatures will have a significant impact on heat-related morbidity and mortality, labour productivity, mental health, and health and well-being outcomes across all sub-regions of Asia  . In West Asia and the North China Plain especially, extreme wet-bulb temperatures are expected to approach, and possibly exceed, the physiological threshold for human adaptability  . By the end of the century, under higher projections , the daily maximum wet-bulb temperature is expected to exceed the survivability threshold across most of South Asia . City- specific studies articulate what these regional projections will mean for urban populations. For example, at 1.5℃ warming, without adaptation, annual heat-related mortality in 27 major cities across China is projected to increase from 32.1 per million inhabitants annually in 1986-2005 to 48.8-67.1 per million. This number increases to 59.2-81.3 per million for 2ºC warming . In the Republic of Korea, deaths from heat disorders are expected to increase approximately fivefold under the RCP4.5 and 7.2-fold under RCP8.5 by 2060 compared with the current baseline value of ~23 people per summer . Importantly, heat exposure is differentiated within cities: it disproportionally affects the poorest populations  and those with lesser access to green spaces .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report