In previous reports, the transition from high to very high risk for the distribution of impacts was not assessed due to limited available literature, but there is now sufficient evidence to do so. A range of literature quantifies the increasing regional probability of drought as compared with the present day, with projected increases in the area exposed to drought , as well as in the duration  and frequency of droughts, with higher warming levels. Naumann et al.  showed that, for drying areas, drought durations are projected to rise from 2 months per ℃ below 1.5°C to 4.2 months per °C near 3ºC warming. Most of Africa, Australia, southern Europe, southern and central USA, Central America, the Caribbean, northwest China, and parts of Southern America are projected to experience more frequent droughts. Adverse effects of climate change on food production are projected to become much more severe  when global temperatures rise more than 2ºC globally, but there are predicted to be much more negative impacts experienced sooner on food security in low to mid-latitudes  . For instance, climate change by 2050 is projected to increase the number of people at risk of hunger by between 8 and 80 million with 2-3ºC warming compared with no- climate-change conditions . In addition to effects upon crop yield, agricultural labour productivity, food access and food-related health are projected to be negatively impacted by 2-3ºC warming . Regionally, substantial regional disparity in risks to food production is projected
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report