Emergency Shelter
Why shelter beats food on the priority list
In cold wind and rain, exposure can kill in hours — long before thirst or hunger become dangerous. The body loses heat five ways: conduction (cold ground), convection (wind), radiation (bare head/neck), evaporation (wet skin), respiration (breathing cold air). Every shelter trick below blocks one or more of those doors.
At a glance
- Cold exposure can kill in hours — shelter outranks food and water.
- The body loses heat five ways: cold ground, wind, bare head/neck, wet skin, breathing.
- 10 cm (4 in) of dry leaves or boughs under you beats any roof improvement.
- Never heat indoors with anything that burns fuel — carbon monoxide kills quietly.
Sheltering at home without power or heat
Your house already is a shelter — the job is holding heat inside it.
- Pick one room, ideally small, interior-facing, above ground level but not the top floor. South-facing windows collect winter sun.
- Seal it: close doors to unheated space, roll towels against door gaps, tape plastic or blankets over large window panes (leave a peep for light).
- Insulate from below: carpets, blankets, cardboard on the floor. The ground steals heat faster than the air does.
- Layer clothing loose, not tight: air trapped between layers is the insulation. Hat on — bare heads radiate real heat.
- Everyone sleeps together in one bed area; shared body heat is free heating. Cover with wool or synthetic blankets; down sleeping bags rank highest.
Never heat indoors with combustion
Grills, generators, camp stoves, charcoal, and unvented heaters produce carbon monoxide — see Heating & Cooking Safely. Insulation strategies must carry the load unless a proper vented fireplace or wood stove exists.
Field shelter: the tarp A-frame
One tarp (or poncho, or plastic sheeting) and cordage makes weatherproof cover in fifteen minutes.
- Site first: out of low ground where cold air and water pool, clear of dead branches overhead ("widowmakers"), shielded from prevailing wind, near (but never below) your water source.
- Run a ridge line between two trees, waist-chest height, drum-tight.
- Drape the tarp over it like a roof; stake or tie corners low and wide on the windward side, slightly higher on the entry side.
- Angle the back into the wind. Windward edge pinned to the ground; leeward edge left lower for airflow — condensation needs somewhere to go.
- Ground insulation decides comfort: 10 cm (4 in) of dry leaves, pine boughs, or grass under you beats any roof improvement. Cold ground wins every night otherwise.
Small shelters hold warmth better than large ones. Make it just big enough to lie in, not sit up in.
If someone is already hypothermic
- Handle gently — rough movement can trigger heart trouble in a very cold person.
- Swap wet clothes for dry; insulate from ground; wrap including head.
- Warm sweet drinks if fully alert; no alcohol, no rubbing limbs, no direct fire heat.
- Shivering that stops while still cold-minded is a late sign: emergency.
Grounded in public-domain FEMA ready.gov and FM 21-76 field manual principles. Educational only.