> At least 3.3 billion people, about 40% of the world population, now fall into the most serious category of "highly vulnerable", with the worst effects in the developing world.[35] If emissions continue on their current path, Africa will lose 30% of its maize cultivation territory and 50% of its land cultivated for beans. One billion people face flooding due to sea level rise.[34] Climate change, together with other factors, also increases the risk of infectious diseases outbreaks like the COVID-19 pandemic. The report also cites evidence that China will pay the highest financial cost if the temperature continue to rise. The impacts will include food insecurity, water scarcity, flooding, especially in coastal areas where most of the population lives due to higher than average sea level rise, and more powerful cyclones. At some point part of the country may face wet-bulb temperatures higher than humans and other mammals can tolerate more than six hours

Source: https://en.wikipedia.org/wiki/IPCC_Sixth_Assessment_Report#I...

Plus however many lives could be lost due to https://en.wikipedia.org/wiki/Climate_migration