regardless of the decision that lead to the situation … anyone can find themselves experiencing hypothermia should they make a mistake (and EVERYONE makes mistakes)
what can you do once it gets cold and wet?
– clothes … you can survive being cold, you cant survive being wet and cold … take off the wet clothes and get into a waterproof shelter or bivy when stopped … if you can keep moving, have a WPB jacket, for 6 oz and 100$ (OR Helium) theres no excuse not to carry one… have clothes that are quick drying … items like fleece that have a fuzzy interior you can wear damp as the moisture is much reduce over the skin, rather than stuff like wet base layers which simply seep the heat out of you … a wet synthetic jacket aint the best, but you can put it OVER you WPB jacket an still get some insulation …
– shelter … bivy bag, bothy, garbage bag, whatever … you simply need to get out of the rain and preserve our heat … in emergency situations a tight enclosed space works better than a tarp as you save heat and it works as a vbl …
– fire … a highly neglected skill … ill simply ask when was the last time you practiced starting a fire when its pouring rain or in heavy snow … its quite a bit different from doing it in ideal conditions … if you cant start one in adverse conditions, dont make the assumption you can … youll need a good knife to shave the wood, some kind of cover, an utterly reliable long burning firestarter, and a LOT of practice … because the moment you need it most youll be borderline hypothermic …
– stove … in winter or in groups an UL canister stove if a fire cant be started … boil the water, put it in a hawt nalgene or even a metal cup/bottle which is usable over a fire (either of which many BPLers say serves no purpose cause its heavy) and use that to warm you up … dont bother with alchy or esbit, or other such … when your shivering you want KISS and fast boiling …
– heat packs … you can carry a 12+ hour heat pack for an emergency … combine that with an emergency bag and youll likely survive a night …
– blizzard bag … the us/uk army, uk sar an other agencies use this for hypothermia treatment … it is simply a rated 40F sleebing bag and WP bivy combined that weights 360g and cost 40 bucks … when you cant start a fire its gold, its that simple
– in the longer run have SYSTEMS that prevent a hypothermic situation … synthetic clothing or quilts can help reduce the chance of insulation loss (especially when the sun dont shine for days or weeks, which many BPLers cant fathom), a hawt nalgene is a proven life saver in adverse conditions, a clothing system where you sweat minimally (eskimos know that sweat kills in winter), etc …
all of this weights more of course … and NONE of it can be learned by reading the intrawebs or even this post … you NEED to go out and practice these SKILLS … in your back yard, in the park, on a short daytrip, etc …