If you get lost in extremely cold weather and cannot start a fire, what is the best survival strategy?

Wrapping up in a thermal blanket is the best survival strategy in extremely cold weather when you cannot start a fire. A thermal blanket is designed to retain body heat, which is crucial in preventing hypothermia and maintaining core body temperature. By using a thermal blanket, you create a barrier that minimizes heat loss and helps to preserve warmth, which is vital for survival in such conditions.

While keeping moving can generate some warmth, it can also lead to energy depletion and sweat, which can further cool the body once you stop. Drinking water is important for overall hydration but does not directly address the immediate need for warmth in freezing temperatures. Attempting to scream for help may not be effective and may waste energy that could be better used for more practical survival measures. Therefore, utilizing a thermal blanket is the most effective way to enhance your chances of survival until help arrives.