Shelter is a system, not a sheet of material

An emergency shelter must address the site, ground, wind, precipitation, ventilation, clothing, and the person inside it. A perfect tarp pitch in a flood channel or beneath a damaged tree is still a dangerous shelter.

Emergency: call 911 or the local rescue authority for serious injury, altered mental status, suspected hypothermia or heat stroke, breathing trouble, or dangerous exposure. Move from an immediate threat when you can do so safely and follow official instructions.

First decision: move or shelter here?

  1. Identify immediate threats. Look for rising water, a dry wash or flood channel, surf or tide reach, wildfire and smoke, avalanche or rockfall paths, unstable slopes, dead or damaged overhead branches, exposed ridges, isolated tall objects, and traffic.
  2. Move only as far as safety requires. If rescuers are looking for you, communicate the new position and direction when possible. Avoid turning a short relocation into unplanned travel.
  3. Choose the best available compromise. Favor stable, drainable ground with natural wind reduction, adequate visibility, a safe exit, and enough room to deploy equipment without damaging the area.
  4. Act before dexterity and judgment decline. Add layers, protect insulation, and deploy shelter before darkness, heavy precipitation, or cold makes the work harder.

For the decision to retrace or remain available to rescuers, use the navigation and lost-person guide.

The 60-second site check

Do not seal yourself in. Maintain ventilation, an exit you can operate, and separation from flames, stoves, heaters, and exhaust. Never use a fuel-burning stove, grill, or generator in a tent or other enclosed shelter.

Build four protective layers

1. Ground

Use a sleeping pad, pack, spare clothing, dry natural material where permitted, or another barrier. Prioritize the torso and hips while avoiding pressure and circulation problems.

2. Body

Replace or isolate wet clothing when possible. Add dry insulation and wind/rain protection without trapping the face or restricting breathing.

3. Weather shell

Deploy a tarp, bivy, tent, emergency blanket, or poncho. Pitch low against wind, direct runoff away, secure every component, and retain ventilation.

4. Monitoring

Recheck the person and shelter. Watch for worsening shivering, confusion, unusual behavior, loss of coordination, breathing changes, overheating, headache, nausea, or faintness. Check anchors, pooling water, snow loading, abrasion, condensation, and wind shifts.

Hazard-specific adjustments

Adaptive shelter planning

Common shelter failures

A safe 20-minute deployment drill

  1. Practice in familiar, managed terrain during safe daylight weather, with permission and a normal shelter nearby.
  2. Complete the 60-second site check aloud and identify one reason to reject a possible site.
  3. Start a 10-minute timer. Deploy ground insulation and weather protection using only carried equipment.
  4. Enter safely, locate the exit, check ventilation and runoff, and retrieve light, communication, medication, and repair items.
  5. Repeat one setup with gloves, limited grip, or low light—without creating a fall or entrapment hazard.
  6. Inspect every component for tears, wetness, weak anchors, inaccessible controls, and slow steps. Repair and repack it immediately.

Official sources and review notes

Reviewed August 4, 2026. Check current forecasts, warnings, land-manager rules, fire restrictions, and location-specific hazards before departure.

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