One could argue that heat related deaths could be due to the fact that there are more old people alive right now compared to any point in time in human history due to high life expectancy and they are the most vulnerable to heatwaves. Had the percentage of younger population been higher, the numbers would have been different. Also in a way it’s Karma, that older population is the one that lived their lives like there’s no future and thought that climate change is a problem for younger generations and now they would be the first to die like flies