Summer is here and being outside in the heat can take a toll on your body if you’re not properly prepared. It’s important to regulate your body temperature by both hydrating and gradually acclimating your body to withstand the increasingly hot conditions. Your body has “heat control mechanisms” which get overworked in hot, humid and poorly ventilated areas. When you’re exercising or doing physical labor, your muscles generate heat as a metabolic by-product.

Sweating can dissipate heat when the air is dry or a breeze is blowing. But when humidity rises and the air becomes denser, sweat doesn’t evaporate from the skin as readily. When this occurs, your core body temperature becomes too high and you can suffer from heat cramps, heat exhaustion or heat stroke. This heat stress can occur suddenly and be very dangerous, that’s why it’s important to be able to recognize the warning signals. This chart will help you identify your body’s heat stress signals and apply the appropriate action to prevent heat-related problems.