Furthermore, the expected future increase in the number of people exposed to climate hazards, such as sea level rise and coastal flooding, is not only determined by changing hazard patterns, but also by regional processes of migration and urbanisation for example in Asia and Africa, including an increasing number of urban poor living in low-elevation coastal zones . This can increase again the probability that more people require assistance and support for buffering these effects of climate-related hazards, for example, in coastal zones. Historical urbanisation processes, in coastal cities in Asia  and Africa  have increased the exposure of people to climate hazards, such as sea level rise, which by 2100 under Relative Concentration Pathway  8.5 will globally threaten 630 million people, largely in coastal cities .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report