Climate change will have negative effects on food security and nutrition in 2050  . How many people are affected will depend considerably on non-climatic drivers of food security , but modelling studies agreed that climate change would increase the risk of food insecurity. For example, one study comparing an RCP8.5 scenario with one that has zero climate impacts estimates 65 million additional people  will experience food insecurity due to climate change impacts in 2050 . Another study accounting for climate extreme events estimates that, by 2050, the number of people at risk of hunger will increase by 20% and 11% under high- and low-emission scenarios, respectively, owing to a once-per-100-year extreme climate event . Sub-Saharan Africa and South Asia in this study were projected to be at the greatest risk, with triple the amount of South Asia's current food reserves needed to offset such an extreme event. Models suggest that food security and malnutrition impacts will be much more severe from 2050 onwards relative to pre- 2050, but the scale and extent of the impacts will strongly depend on the GHG emission scenario . Due to CIDs and non-climate drivers of food insecurity, Sub Saharan Africa is projected to be the hardest hit, followed by South Asia and Central and South America, but contingent on adaptation level .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report