Winter walking in the UK hills and countryside is a joy—crisp air, frosty views, and the quiet of a snow-dusted path. But cold, wet and wind can drain your body heat faster than you expect. Hypothermia is not just a mountaineering problem; it can strike on a low-level ramble, a coastal path, or a leisurely stroll across the moors. The key is to recognise the signs early and act calmly. This guide will help you spot trouble and respond in the right way.

How hypothermia begins on a winter walk

Your body works hard to keep its core temperature around 37°C. When you are exposed to cold, wind and rain, that effort becomes harder. Heat loss happens through convection, conduction, evaporation and radiation. Wet clothing, a biting wind and tiredness all speed up the process. The dangerous moment often comes when you stop moving—perhaps for a snack, a photo, or a map check. Your muscles are no longer generating heat, and the cold seeps in. Add in a lack of food or drink, and your defences drop quickly. Recognising that hypothermia is a possibility on any winter outing is the first step to staying safe.

Early signs: the subtle changes to watch for

Hypothermia creeps in gradually. The earliest signs are easy to dismiss as just feeling a bit cold or tired. Watch for:

• Slurred speech – words may become mumbled or hesitant.
• Clumsiness – fumbling with zips, dropping gloves, or tripping more than usual.
• Unusual tiredness – a sudden lack of energy, or wanting to sit down and stop.
• Cold, pale skin – especially on the hands, feet and face.
• Shivering – mild at first, but a sign the body is struggling.
• Confusion or irritability – snapping at companions, or making odd decisions.

These signs can appear even if the person says they are fine. Trust your observations. If someone in your group is shivering and acting out of character, treat it as a warning.

Later signs: when hypothermia becomes serious

As hypothermia deepens, the signs become more alarming. Shivering may stop—this is not a good sign; it means the body has given up trying to generate heat. The person may become drowsy, uncoordinated, and unable to walk without help. Their speech may become incoherent. Skin can turn blue or grey, especially on the lips and fingers. They may resist help or seem unaware of the cold. At this stage, immediate action is essential. Do not wait for them to ask for help; they may not be able to.

Immediate actions: shelter, insulate, warm gradually

If you spot hypothermia, act quickly but gently. The aim is to stop further heat loss and warm the person gradually.

• Shelter from wind, rain and snow. Use a bothy, a wall, a rucksack as a windbreak, or an emergency shelter. Get the person off the cold ground—sit them on a foam mat or spare clothing.
• Insulate with dry layers. Remove wet clothing if you can do so without exposing them to more cold. Wrap them in a sleeping bag, foil blanket, or spare fleeces. Cover their head and neck.
• Warm gradually with gentle heat. Use body-to-body contact, warm drinks (sweet, not alcoholic) if they are fully conscious, and warm packs placed near the core—armpits, groin, neck. Do not rub limbs vigorously or put them in a hot bath; rapid warming can cause shock.

Keep the person still and monitor their breathing. If they become unconscious, place them in the recovery position and be prepared to start CPR if they stop breathing.

When to call for help

Call for help if symptoms worsen, if the person becomes drowsy, confused, or loses consciousness, or if you cannot warm them effectively. In the UK, dial 999 and ask for mountain rescue or ambulance, depending on your location. Give clear details: your location, grid reference if possible, the person's condition, and the weather. Keep them sheltered and insulated until help arrives. Do not leave them alone.

Simple habits to stay warm and safe

Prevention is always better than cure. Check the forecast and plan for the worst. Wear layers—base layer, insulating mid-layer, and waterproof outer. Carry spare gloves, a hat, and a warm flask. Eat and drink regularly; hunger and dehydration make you more vulnerable. Keep moving, but pace yourself. If you stop, put on an extra layer before you cool down. Learn to recognise the early signs in yourself and others. And remember: it is never a failure to turn back. The hills will still be there another day.