Evidence exists that threats to land-based livelihoods and risks of undernutrition increase significantly with higher levels of global warming . With global warming of 1.5℃ or less, impacts of climate change on livelihoods are still significant, for example, for West Africa and the Sahel there will be an estimated reduction of the area suitable for maize production of about 40%. The consequences of global warming of up to 3ºC would mean a high risk of undernutrition for entire regions  that are already classified as most vulnerable . That means the consequences of significant warming are a particular challenge for regional hotspots of vulnerability. Small changes in crop productivity, already observed due to increasing droughts, floods or changes in rainfall patterns, could lead to severe health risks and undernutrition. This is because of existing precarious living conditions and the limited capacities that people and institutions have to build and enhance coping and adaptive capacities at the level of individual households, communities and state institutions . The risk of loss of life, displacement and adverse health consequences due to climate change in these most vulnerable regions  is higher compared to regions classified as having
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report