HEAT STROKE

Heat stroke is a serious medical condition that occurs when the body is no longer able to regulate its temperature effectively. The risk increases during long bicycle rides in hot and humid weather, especially when you are dehydrated or performing intense physical activity under direct sunlight.

For cyclists, the best way to reduce the risk is to avoid riding in intense sunlight, particularly between 11:00 a.m. and 4:00 p.m. Wearing light-colored, breathable cycling clothing, staying well hydrated, replacing lost electrolytes, and using sunscreen can also help prevent heat-related illnesses.

Symptoms

Heat stroke and other heat-related illnesses may cause the following symptoms:

• Weakness and fatigue
• Dizziness
• Headache
• Intense thirst
• Nausea or vomiting
• Muscle cramps
• Rapid heartbeat
• Confusion or disorientation

In severe cases, loss of consciousness may occur and requires immediate medical attention.

First Aid

• Move the person immediately to a shaded or cool place.
• Stop the ride and allow them to rest.
• Loosen or remove excess clothing.
• Cool the body using wet towels, cold compresses, or a fan.
• If the person is conscious, give small sips of water or an electrolyte drink.
• If vomiting, confusion, fainting, or symptoms persist, call the local emergency medical service immediately.

Prevention

• Avoid riding during the hottest hours of the day.
• Drink water regularly; do not wait until you feel thirsty.
• Replace electrolytes during long rides.
• Wear light-colored, breathable clothing.
• Take regular breaks and rest in the shade.

🟢 TIP

Plan your ride according to the weather forecast. Starting early in the morning or riding later in the evening is usually safer during the summer months.

🟡 CAUTION

Do not ignore early warning signs such as dizziness, muscle cramps, or unusual fatigue. Stopping for a short break may prevent a life-threatening emergency.

🔴 EMERGENCY WARNING

Call your local emergency medical service immediately if the person experiences:

• Confusion or altered mental status
• Loss of consciousness
• Difficulty speaking
• Seizures
• Very high body temperature

Heat stroke is a life-threatening emergency and requires immediate medical attention.