Science Magazine reports increased heat exposure is poised to impact the health of more than 4 billion people by 2100.<br />Prolonged heat exposure can lead to everything from kidney problems to brain damage and organ failure, but a few simple steps can lower the risk.<br />Heatstroke sets in when the body reaches about three degrees higher than the average temperature. Sweating leads to dangerous hydration.<br />So, drink water beyond the point of thirst and immerse your body in water--or at least splash cold water on the skin.<br />If you have to work outdoors, let yourself adapt gradually to the heat by limiting yourself to two hours a day for about a week.
