Heat Loss at Camp: Recognizing Early Hypothermia Before It Becomes an Emergency

A camper does not need to be in dramatic winter conditions to become dangerously cold. Rain, wind, damp clothing, missed meals, fatigue, and a long evening of sitting still can steadily drain heat in any season. The important skill is noticing the change while the person can still make good decisions, get dry, eat, drink, and help set up shelter.

Hypothermia is a drop in the body’s core temperature. Early symptoms can be subtle and are easy to dismiss as ordinary discomfort after a hard day. Treating them promptly is usually far simpler than trying to manage a person who is confused, poorly coordinated, or unable to rewarm.

Before relying on your camp’s emergency plan
Check the current forecast, wind and precipitation warnings, fire or stove restrictions, road and trail conditions, and the emergency contact process for the park or backcountry area. Confirm whether 911 service is available where you will be, what satellite communicator or check-in plan your group will use, and the location of the nearest staffed facility or evacuation point through official park, provincial, territorial, or local sources.

Why campers lose heat faster than expected

Your body loses heat in several ways at once. Wind moves warm air away from your clothing. Water conducts heat away much faster than dry air, so wet socks, rain-soaked layers, sweat, and damp gloves matter. Cold ground pulls warmth from an uninsulated sleeping pad or a person sitting on a rock or log.

Fatigue makes the problem worse. A tired camper may move more slowly, postpone setting up shelter, forget to eat, or decide it is easier to stay in wet clothing for “just a few more minutes.” Low food intake and dehydration can also reduce the energy available for keeping warm.

This is why hypothermia can develop on a cool, wet autumn day, during a spring paddling trip, or after a summer thunderstorm—not only in deep winter. A high-quality sleeping bag helps overnight, but it does not replace dry layers, wind protection, food, or a plan for getting a chilled person warm before bed.

Recognize the early signs

Shivering is often the first obvious warning. It is your body’s attempt to generate heat, and it should prompt action rather than a debate over whether the person is “actually cold.” Early hypothermia may also look like:

• Persistent shivering, chattering teeth, or difficulty warming up after activity stops
• Cold, pale, numb, or clumsy hands and feet
• Fumbling with zippers, buckles, a stove, or simple camp tasks
• Slower speech, irritability, unusual quietness, or poor judgement
• Tiredness out of proportion to the day’s effort
• Stumbling, loss of coordination, or trouble walking a straight line
• A person saying they are fine while clearly becoming less capable

No single sign provides a complete diagnosis. A camper may be cold, exhausted, dehydrated, injured, intoxicated, or affected by another medical condition. In camp, the sensible response is still similar: stop the heat loss, assess the person, and treat worsening symptoms as serious.

Pay attention to changes in behaviour

Mental changes are especially important. Someone who cannot follow a simple instruction, repeatedly makes unsafe choices, seems confused about routine details, or cannot manage their own clothing may be beyond the stage where they can safely “walk it off.” Do not leave that person alone to rest in a tent or vehicle.

Shivering can lessen or stop as hypothermia worsens. That is not necessarily improvement. If a person remains cold but is no longer shivering, appears drowsy, becomes confused, or loses coordination, treat the situation as urgent.

Take action at the first signs

The goal is to stop further cooling and provide gentle, steady warming. In mild cases, early action may allow the person to recover comfortably. It also protects the rest of the group from becoming cold while trying to push onward.

1. Stop the exposure

Get out of wind, rain, snow, and cold water. Use a tent, tarp, vehicle, cabin, heated shelter, or any protected spot available. Put an insulating barrier under the person: a sleeping pad is ideal, but packs, dry clothing, folded foam pads, or a tarp with insulation on top are better than bare ground.

If the group is still travelling, this is often the moment to stop the day’s route. Continuing to hike, paddle, ski, or drive a difficult road can deepen fatigue and delay meaningful warming.

2. Replace wet layers carefully

Remove wet clothing when you have dry replacements and shelter ready. Dry the person gently if possible, then add dry base layers, warm socks, an insulating mid-layer, a toque, and a windproof outer layer. Cover the head and neck, but avoid compressing insulation with overly tight clothing.

For a chilled person, a sleeping bag or blankets work best when paired with insulation underneath. A warm sleeping bag placed directly on cold ground still loses heat from below.

If you do not have a full dry change, prioritize the layers that are wettest and most important for heat retention: socks, gloves, base layers, and anything soaked by rain or sweat. Protect the remaining damp clothing from wind and add dry insulation over it where necessary.

3. Add warm, easy energy and fluids

If the person is awake, alert, and swallowing normally, offer warm, sweet, non-alcoholic drinks and easy-to-eat food. Soup, tea, warm drink mix, oatmeal, or a snack with carbohydrate can be useful. Small amounts taken regularly may be easier than a large meal.

Do not give alcohol. It can impair judgement and increase heat loss despite creating a temporary sensation of warmth. Avoid giving food or drink to someone who is confused, very drowsy, vomiting, or having trouble swallowing; choking is a real concern.

4. Warm the core gradually

Use dry insulation and gentle external warmth around the torso, neck, armpits, and groin. Warm water bottles can help when securely sealed, wrapped in cloth, and comfortably warm rather than hot. Check the skin often, particularly if sensation is reduced.

Avoid trying to rapidly heat cold hands and feet with very hot water, a stove, a fire, or an electric heater. High heat can burn numb skin and may be uncomfortable or counterproductive for someone who is significantly hypothermic. Do not massage or rub cold skin vigorously.

A fire can improve morale and provide warmth, but it should not be the only plan. Fire building takes time, fuel, attention, and dry materials. A person who is wet and deteriorating needs shelter, dry insulation, and close observation while the group manages any fire safely.

5. Keep watch and reassess

Stay with the person. Note whether shivering decreases as warmth and alertness improve, whether they can speak clearly, whether coordination returns, and whether they are able to eat and drink safely. Keep them resting on insulation and protected from the elements.

If the person improves fully, do not assume the day can simply continue as planned. Their energy reserves may be low, their clothing may still be damp, and changing weather can reverse a partial recovery. A conservative choice—ending the day early, choosing a shorter route, or moving to a heated shelter—can prevent a second, more serious episode.

When to stop the trip and seek help

Stop travelling and begin your emergency or evacuation plan when warming is not clearly working, when symptoms are worsening, or when a person cannot safely care for themselves. Seek urgent medical advice or emergency assistance for signs such as:

• Confusion, slurred speech, unusual behaviour, or inability to answer basic questions
• Loss of coordination, repeated falls, inability to walk safely, or profound weakness
• Shivering that stops while the person remains cold, lethargic, or impaired
• Extreme drowsiness, reduced responsiveness, or loss of consciousness
• Slow, weak, or irregular-looking breathing or pulse
• Chest pain, severe shortness of breath, seizure, or suspected heart problems
• Hypothermia after immersion, especially in cold water
• A cold-exposed person who is injured, alone, very young, older, pregnant, or has a condition that may complicate warming

Call 911 where available, activate your satellite SOS device if that is your emergency plan, or contact park staff, rescue services, or another available emergency channel. Give your exact location or coordinates, the person’s symptoms, how long they have been wet or cold, what warming steps you have taken, and any injuries or medical concerns.

Move a severely cold person gently and keep them lying down or comfortably supported when possible. Do not make them exercise intensely to warm up, and do not assume they can safely hike out because they briefly seem more alert. Follow instructions from emergency dispatchers or rescuers.

Build a camp routine that catches cold early

The best hypothermia response starts before anyone is shaking. At camp, make warmth part of the arrival routine:

• Put on a wind layer or dry insulating layer as soon as you stop moving.
• Change out of wet socks and sweaty base layers before you feel deeply chilled.
• Set up sleeping pads and dry sleeping gear early, before fatigue makes every task slower.
• Eat and drink before the evening temperature drops further.
• Keep rain gear, warm layers, headlamps, and shelter supplies accessible rather than buried in a pack.
• Check on quieter or less experienced members of the group; people often understate how cold they are.
• Carry enough group shelter, insulation, communication equipment, food, and water treatment capacity for an unplanned stop.

In shoulder seasons and winter, designate a dry clothing reserve that is protected in a waterproof bag and not worn during daytime travel. It does not need to be elaborate: dry socks, a base layer, toque, gloves, and a warm layer can make a major difference when conditions turn unpleasant.

Make the conservative call early

A route, reservation, or summit is never more important than a camper who is getting colder, less coordinated, or less clear-headed. When early hypothermia signs appear, stop exposure first, get dry, insulate from the ground, provide safe warmth and energy, and watch closely.

For your next trip, pack a dry-layer reserve, ensure every sleeping setup includes adequate ground insulation, and agree on a simple group rule: persistent shivering or declining coordination means the group pauses and warms up. That small decision can keep a difficult camp night from becoming an emergency.