3 minutes. 3 hours. 3 days. 3 weeks. Why does survival always come in threes?
The Rule of Threes is a survival rule of thumb:
• AIR: about 3 minutes without it
• SHELTER: about 3 hours in extreme cold or heat
• WATER: about 3 days
• FOOD: about 3 weeks
The order matters: fix the fastest clock first. And the “72 hours” many governments mention is a different clock: it’s about how long you may be on your own, not your body’s limit.
⚠️ It’s a rule of thumb, not a law. Age, health and weather change every number. General information only.
Sources: Wikipedia “Rule of threes (survival)”; Colin Towell, Essential Survival Skills.
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