Core body temperature of pigs increases when the rate of heat accumulation exceeds the rate ofheat loss. This increase in core body temperature removes the animal from a thermal comfort zonecausing heat stress. The acute, severe effects of heat stress on humans can result in death and aregenerally well-reported in the news (e.g. European heat wave of 2003, Middle East- 2015, France-2019).This article is published as Rudolph T, Rhoads R, Baumgard L, and Selsby JT. Why we should sweat heat stress. National Hog Farmer. December 3, 2019. Posted with permission.</p