This article proposes a novel framework classification for the heat illnesses. It argues that
heat stroke is the only described condition that is truly a “heat illness” since it is the only
condition in which there is clear evidence for a pathological elevation of the core body
temperature. If this is correct the non-descript terms such as heat fatigue, heat exhaustion
and heat syncopy should be removed from the modern lexicon. Since the evidence is that
most cases of post-exercise collapse are due to the development of postural hypotension …