Check weather conditions before heading outdoors. That includes wind chill, which can greatly impact your body temperature.
The wind chill is based on the rate of heat loss from exposed skin caused by combined effects of wind and cold. As the wind increases, heat is carried away from the body at an accelerated rate, driving down the body temperature. Animals are also affected by wind chill.
During severe cold weather conditions, your best line of defense is to stay inside your home or vehicle.
However, if you must be outside, avoid overexertion — such as shoveling heavy snow, pushing a car, or walking in deep snow. The strain from the cold and the hard labor may cause a heart attack. Sweating could lead to a chill and hypothermia.