Quick facts
- Wet clothing, wind, exhaustion, and poor nutrition speed heat loss.
- Shivering can be an early sign; stopped shivering can be more serious.
- Unsafe backup heat can add carbon monoxide risk during winter outages.
Plain-English meaning
Hypothermia happens when the body loses heat faster than it can produce it. It is not only a mountain or wilderness problem. It can happen during winter outages, vehicle breakdowns, wet clothing exposure, or long waits in cold wind.
The danger is that cold affects the brain and movement. A person may become clumsy, quiet, confused, or sleepy exactly when they need to make good decisions.
Why it matters in the first hour
The first hour is about stopping heat loss: get out of wind, remove wet clothing if possible, add dry layers, cover the head and hands, and use safe heat only.
If heat fails at home, carbon monoxide becomes a second hazard. Generators, grills, and camp stoves do not belong indoors or in garages.
What this page is not
This page explains the concept. Suspected severe hypothermia or frostbite needs emergency medical help.
Sources and how they are used
- National Weather Service: Winter Safety Official safety source
- CDC: Carbon Monoxide Basics Official safety source
- Wikipedia: Hypothermia Background explainer