Heat stress occurs when the body’s means of controlling its internal temperature starts to fail. As well as air temperature, factors such as work rate, humidity and clothing worn while working may lead to heat stress. Therefore it may not be obvious to someone passing through the workplace that there is a risk of heat stress. Reaction of Body to Heat 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 can also be lost by radiation and convection from the body’s surface.
Symptoms: Heat stress can affect individuals in different ways, and some people are more susceptible to it than others. Its symptoms are inability to concentrate, muscle cramps, heat rash, severe thirst - a late symptom of heat stress, fainting, heat exhaustion - fatigue, giddiness, nausea, headache, moist skin, Heat stroke - hot dry skin, confusion, convulsions and eventual loss of consciousness. This is the most severe disorder and can result in death if not detected at an early stage.
Around 10,649 deaths are caused due to heat stress and about 45% are from Finland