The way to avoid frostbite and hypothermia is to plan for extreme cold before it arrives. Don't get caught unprepared.
Check the Forecast at weather.gov or your favorite weather app, station, etc.: Make checking the forecast part of your regular routine so you'll know when to expect cold weather.
Adjust Your Schedule: If possible, adjust your schedule to avoid being outside during the coldest part of the day, typically the early morning. Try to find a warm spot for your children while waiting for the school bus outside.
Protect Your Pets, Livestock and other Property: If you have pets or farm animals, make sure they have plenty of food and water, and are not overly exposed to extreme cold. Take precautions to ensure your water pipes do not freeze. Know the temperature thresholds of your plants and crops.
Fill up the tank: Make sure your car or vehicle has at least a half a tank of gas during extreme cold situations so that you can stay warm if you become stranded.