Climate First Aid: How to Act During Heat Stroke and Hypothermia

When Weather Becomes a Health Threat

Extreme weather events don't just affect crops and infrastructure; they pose direct risks to human health. In South America, where temperatures can range from 45°C in the Chaco to -25°C in Patagonia, knowing climate first aid is essential. Heat stroke and hypothermia are two medical emergencies requiring immediate intervention, and proper management can save lives.

Heat Stroke: When the Body Loses Thermal Control

Heat stroke occurs when the body's core temperature exceeds 40°C and its thermoregulatory system fails. Unlike heat exhaustion or sunstroke, heat stroke is a medical emergency that can damage vital organs and cause death in less than an hour if not treated properly.

Warning Signs

Recognizing early symptoms is crucial to prevent serious complications:

• Core body temperature above 40°C (measured with a thermometer)
• Hot, red, and dry skin (without sweating)
• Rapid and strong pulse
• Throbbing headache
• Confusion, disorientation, or loss of consciousness
• Seizures in severe cases

Immediate First Aid

If you suspect someone is suffering from heat stroke, act quickly:

1. Call emergency medical services immediately (911 or the local number)
2. Move the person to a cool, shaded area
3. Cool them down rapidly using any available method: wet cloths, cold water bath, fans
4. Do not administer fluids if the person is unconscious or confused
5. Monitor breathing until medical help arrives

Prevention in Hot Climates

Farmers, construction workers, and athletes are especially vulnerable. Prevention includes:

• Scheduling intense activities during the coolest hours of the day
• Wearing light, light-colored, breathable clothing
• Drinking water regularly, even without thirst (at least 2 liters on hot days)
• Taking frequent breaks in shaded areas
• Using sunscreen and a wide-brimmed hat

Hypothermia: When the Cold Gets to the Bone

Hypothermia occurs when the body's core temperature drops below 35°C. In Andean and Patagonian regions, where temperatures can drop abruptly, this risk is particularly relevant for mountaineers, rural workers, and communities in high-altitude areas.

Stages and Symptoms

Hypothermia progresses through three stages with distinct symptoms:

• Mild (32-35°C): Uncontrollable shivering, pale skin, difficulty speaking
• Moderate (28-32°C): Shivering stops, confusion, clumsy movements, weak pulse
• Severe (below 28°C): Loss of consciousness, dilated pupils, very slow breathing

Action Protocol

In a case of hypothermia, follow these steps:

1. Seek shelter immediately from wind and moisture
2. Remove wet clothing carefully (cutting it if necessary)
3. Warm the person gradually with dry blankets, skin-to-skin contact
4. Offer warm, sweet drinks only if the person is conscious
5. Do not rub the extremities or use direct heat (electric heating pads)
6. Keep the person horizontal and avoid sudden movements

Precautions in Cold Environments

The key lies in preparation and proper equipment:

• Use the layering system (moisture-wicking, insulating, waterproof)
• Especially protect the head, hands, and feet (where the most heat is lost)
• Stay dry (moisture accelerates heat loss)
• Eat properly (the body needs energy to generate heat)
• Recognize the early signs in yourself and your companions

The Role of Technology in Prevention

Applications like Contingencias allow for anticipating dangerous weather conditions. Setting up personalized alerts for extreme temperatures can make the difference between prevention and emergency. Farmers can schedule irrigation and harvests to avoid the hottest hours, while hikers can postpone outings in the face of extreme cold forecasts.

Specific Risk Factors in South America

Some regional particularities increase vulnerability:

• Altitude: In Andean zones, temperature drops approximately 6.5°C for every 1000 meters of ascent
• Humidity: In the Amazon and coastal areas, high humidity makes thermoregulation difficult
• Wind: In Patagonia, wind can multiply the cold wind chill effect
• Acclimatization: Urban populations are more vulnerable when moving to extreme environments

Conclusion: Preparation and Knowledge Save Lives

Climate first aid should be part of basic education in countries with extreme climates like those in South America. Both heat stroke and hypothermia are medical emergencies requiring immediate intervention and specific knowledge. The combination of personal preparation, proper equipment, and early warning technology represents the best defense against these climate risks. Remember: in severe cases, always seek professional medical help immediately, as these conditions can have complications requiring hospital treatment.