For other uses, see Serial killer (disambiguation). A serial killer is typically a person who murders three or more people, usually in service of abnormal psychological gratification, with the murders taking place over more than a month and including a significant break (a cooling off period) between them.
Heat rash (prickly heat) is a red or pink rash usually found on body areas covered by clothing. It can develop when the sweat ducts become blocked and swell and often leads to discomfort and itching. Heat rash is most common in babies, but it may affect adults in hot, humid climates.
Causes of heat stress and heat-related illness. There are many factors which can cause heat stress and heat-related illness, including: Dehydration â to keep healthy, our body temperature needs to stay around 37Â°C. The body cools itself by sweating, which normally accounts for 70 to 80 per cent of the bodyâs heat loss.