Heat stress can be dangerous to anyone who's working in hot temperatures. Heat stress occurs when the body is unable to cool itself due to excessive exposure to high temperatures, high humidity, or physical exertion. Heat stress occurs both inside and outside. It can lead to serious illness and sometimes death. Many of you regularly work in environments where heat stress can occur. This includes production lines, maintenance shops, loading route trucks, field repair service, delivering equipment, the list goes on and on. We want to make sure you're taking precautions to prevent heat stress, so you can continue to perform those jobs successfully.