The number of dangerous heat days  is projected to increase from approximately 60 per year in 1985-2005 to approximately 110, 130 and 140 under RCP2.6, RCP4.5 and RCP8.5, respectively, in the 2060s and to 105, 145 and 196 in the 2090s . Over tropical west Africa, heat-related mortality risk through increased heat and humidity is 6-9 times higher than the 1950-2005 average at GWL 2°C, 8-15 times at GWL 2.65°C and 15-30 times at GWL 4.12℃  . The number of potentially lethal heat days per year is projected to increase from <50 during 1995-2005 to 50-150 at GWL 1.6°C, 100-250 at GWL 2.5°C and 250-350 at GWL 4.4ºC, with highest increases in coastal regions . Increasing urbanisation concentrates this exposure in cities, such as Lagos, Niamey, Kano and Dakar .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report