Hypothermia, or exposure as it Was The prime cause is getting wet and cold but hunger, fatigue and low morale all play a role. Symptoms to watch out for are shivering, endometriosis, fatigue, irritability and unusual or irrational behaviour. Do not ignore these indicators either in yourself or others from the celebration. You cannot use will-power or toughness to deal with hypothermia or Meditherm.
Victims tend to be those who’ve been attempting to keep up with other people that are too fast for them and who don’t want to hold up the group by admitting they are tired or cold. They arrive last at rest stops and don’t have the time to wear additional clothing or eat correctly, again because of fear of slowing the party down. In bad weather this can easily lead to Meditherm or hypothermia machines.
If someone shows signs of Hypothermia in your party take instant actions. If you’re able to, the first thing is to seek nearby shelter like a large boulder. Do not spend time searching for shelter, however, since the sufferer could be deteriorating fast. The intent is to minimize additional heat loss and start re-warming immediately. The casualty ought to be placed in a bivvy bag whenever you can, with some kind of insulating material for example sitmats and rucksacks underneath them.
Unless You’ve Got Meditherm or a tent or band shelter This probably cannot be done without additional heat loss, that must be prevented. In that case only the wet outer coating should be taken off then dry clothes wear over the damp inner garments.
The sole exception I’d make to that is if the casualty is wearing cotton next to the skin, and that they shouldn’t be doing. Because lots of body heat is required to wash out wet cotton I’d remove this garment and then replace it with wool, silk or synthetic shirt even at the risk of losing any heat in the procedure.
Putting the casualty in a sleeping bag, in case You’ve one, will also help. Because the casualty may unable to produce Enough heat themselves it is better if somebody else gets inside it and warms it up first. If there is room somebody could even get in the bivvy or sleeping bag Using Meditherm the casualty for additional warmth.