Emergency Bivouac: How to Survive an Unplanned Night on the Mountain¶

An emergency bivouac can happen to anyone — weather closes in, a route takes longer than expected, or an injury stops progress. This guide covers the decision to stop, site selection, building emergency shelters from available materials, managing hypothermia risk, emergency signaling, and the mental game of surviving an uncomfortable but survivable night.

Introduction¶

It Can Happen to Anyone¶

The Decision to Bivouac¶

When to Stop vs. When to Push On¶

Daylight Assessment¶

Energy and Condition Assessment¶

Site Selection¶

Wind Protection¶

Avalanche and Rockfall Safety¶

Drainage Considerations¶

Shelter Options¶

Emergency Bivy Bag¶

Emergency Blanket¶

Snow Shelters — Trench and Quinzee¶

Rock and Natural Shelters¶

No Equipment — Body Positioning¶

Hypothermia Prevention¶

Insulation from the Ground¶

Layering Strategy¶

Shared Body Heat¶

Staying Dry¶

Food, Water, and Morale¶

Rationing Emergency Supplies¶

Melting Snow for Water¶

Mental Strategies for Long Cold Nights¶

Signaling for Rescue¶

Visual and Auditory Signals¶

Electronic Communication¶

Morning — Getting Out Safely¶