There was a recent study on this issue here. [1] Globally from 2000-2019 there were about 5 million deaths per year associated with "non-optimal" temperatures.

There was a recent study on this issue here. [1] Globally from 2000-2019 there were about 5 million deaths per year associated with "non-optimal" temperatures. This accounted for more about 9.5% of all global deaths. 8.5% of these were because of cold, and less than 1% were due to heat. So if the heat increases, it could be expected to lead to a global reduction in temperature related deaths, which is pretty neat! The most interesting thing about this study is an initially paradoxical (but not really when you think about it) finding. The most mortality from high temperatures came from Eastern Europe, whereas the most mortality from low temperatures came from Sub-Saharan Africa! [1] - https://www.thelancet.com/journals/lanplh/article/PIIS2542-5196(21)00081-4/fulltext https://www.thelancet.com/journals/lanplh/article/PIIS2542-5...