A timely topic for a safety meeting is about working in excessive heat and humidity. The reason being is workers need to take special precautions because such weather conditions can result in a variety of adverse health effects, from discomfort to serious illness, and even death. The body reacts to heat by increasing the blood flow to the skin’s surface and by sweating. This results in cooling as sweat evaporates from the body’s surface and heat is carried to the surface of the body from within by the increased blood flow. Heat also can be lost by radiation and convection from the body’s surface.