Evidence from across the globe finds that interpersonal violence, ranging from use of profanity to violent crime, increases with temperature and sometimes low rainfall . The effect of temperature may be driven by a physiological mechanism , while effects of rainfall may operate through an agricultural yield impacts channel . While few studies link interpersonal violence to climate in Africa, Gates et al.  documents homicide risks increasing under high temperatures in South Africa, and similarity across diverse study settings suggests temperature-induced violent crime likely generalises to Africa .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report