Is carbon monoxide a risk when using a fire in a cave?

Ventilation Risks in Caves

Caves can be notorious for poor ventilation, which exacerbates the dangers of carbon monoxide poisoning. When a fire is lit inside a cave, the combustion process releases carbon monoxide, which can accumulate quickly. To put this into perspective, a small fire can produce over 1,000 parts per million (ppm) of carbon monoxide within a matter of minutes.

Assessing Ventilation in Cave Shelters

When selecting a cave as a shelter, it’s essential to assess the ventilation. Look for any openings or cracks in the rock outcrop that can provide a means for air to enter and exit the cave. A good rule of thumb is to choose a cave with at least one opening that is larger than 1 square foot (0.1 square meters) to ensure adequate ventilation.

Fire Safety Precautions in Caves

If you must use a fire in a cave, take extreme caution to minimize the risk of carbon monoxide poisoning. Keep the fire small and ensure it’s well-ventilated by positioning it near the opening of the cave. Regularly monitor the fire and the cave for signs of carbon monoxide buildup, such as headaches, dizziness, or nausea. If you notice any of these symptoms, immediately extinguish the fire and leave the cave to fresh air.