Outer garments should be tightly woven and water repellent. Mittens are warmer then gloves because fingers share warmth when they touch each other. Cover your mouth. Protect your lungs from extremely cold air. Try not to speak.
Cold weather puts an added strain on the heart.
Unaccustomed exercise such as shoveling snow or pushing cars can bring on a heart attack or make other medical conditions worse. Watch for signs of frostbite or hypothermia. Change wet clothing frequently to prevent loss of body heat. Do not leave the car unless help is visible within 100 yards. Watch for signs of frostbite or hypothermia.