Global warming - induced by the burning of fossil fuels and worsened by deforestation and ecosystem degradation - has lead to an increase in both average and extreme global temperatures. Causing the incidence of heatwaves to have tripled since the 1960's.
Our human body deals with heat through:
Conduction, Convection, Evaporation, & Radiation
And there are some of us who are more at risk:
People who work outdoors, children, elderly, athletes, homeless & displaced, chronically ill
In addition, climate change alters our environment, creating more favorable conditions for the spread of arthropod vector-borne, zoonotic, and waterborne infectious diseases. As well as increase the incidence and intensity of other threats to human health, such as flooding, allergens, lightning storms, wildfires, sand & dust storms, etc.