Surprising (to me): Globally, cold deaths are 9 times higher than heat-related ones. In no region is this ratio less than 3, and in many, it’s over 10 times higher. Cold is more deadly than heat, even in the hottest parts of the world.
ourworldindata.org/grapher/temp-d…
ourworldindata.org/grapher/temp-d…
ourworldindata.org Share of all deaths attributed to sub-optimal temperatures Based on data over the period from 2000 to 2019. Cold and heat can increase the risk of developing certain health conditions or worsen existing ones, such as respiratory infections, cardiovascular,... 
