Cold is still the big killer. 20x that of heat. According to this scientific study. https://www.sciencedaily.com/releases/2015/05/150520193831.h... "Cold weather kills 20 times as many people as hot weather, according to an international study analyzing over 74 million deaths in 384 locations across 13 countries. The findings, published in The Lancet, also reveal that deaths due to moderately hot or cold weather substantially exceed those resulting from extreme heat waves or cold spells."