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Understanding Carbon Monoxide Risks During Severe Weather

June 18, 2026 · The Clime Team
Understanding Carbon Monoxide Risks During Severe Weather

Severe weather events, such as hurricanes, tornadoes, and winter storms, often lead to power outages and increased use of alternative heating and power sources. This heightened reliance can elevate the risk of carbon monoxide (CO) poisoning, a serious health hazard.

What Is Carbon Monoxide?

Carbon monoxide is a colorless, odorless gas produced by the incomplete combustion of fuels like wood, charcoal, gasoline, propane, and natural gas. Common sources include generators, grills, camp stoves, and vehicles. When these devices are used improperly or in enclosed spaces, CO can accumulate to dangerous levels. (cdc.gov)

Why Does Severe Weather Increase CO Risks?

During severe weather, power outages often lead people to use alternative heat and power sources, such as portable generators, gas stoves, and space heaters. If these devices are used indoors or in poorly ventilated areas, CO can build up quickly, posing significant health risks. (newsnetwork.mayoclinic.org)

Symptoms of CO Poisoning

CO poisoning symptoms can be subtle and easily mistaken for other illnesses. Early signs include:

  • Headache

  • Dizziness

  • Nausea

  • Fatigue

High-level exposure can lead to:

  • Confusion

  • Loss of consciousness

  • Chest pain

  • Death

If you experience these symptoms during or after a storm, seek fresh air immediately and consult a healthcare professional. (cdc.gov)

Preventing CO Poisoning During Severe Weather

To protect yourself and your family:

  • Use Generators Safely: Operate generators outdoors, at least 20 feet away from doors, windows, and vents. Never run them in enclosed spaces like garages or basements. (ncoaa.us)

  • Avoid Indoor Use of Outdoor Equipment: Do not use grills, camp stoves, or propane heaters indoors or in enclosed spaces. (ncoaa.us)

  • Ensure Proper Ventilation: Keep furnace, dryer, and water heater vents clear of snow and ice to prevent CO buildup. (ncoaa.us)

  • Check Vehicle Exhausts: Ensure car exhaust pipes are free from snow or ice to prevent CO from entering your home. (ncoaa.us)

  • Install CO Alarms: Place CO detectors on every level of your home and near sleeping areas. Test them regularly and replace batteries as needed. (ncoaa.us)

What to Do if CO Alarm Sounds

If your CO alarm activates:

  1. Evacuate everyone from the building immediately.

  2. Call 911 or your local emergency services.

  3. Do not re-enter the premises until authorities confirm it is safe.

Conclusion

Understanding the risks of carbon monoxide exposure during severe weather and taking appropriate precautions can prevent poisoning and save lives. Always prioritize safety by using fuel-burning devices correctly and ensuring your home is equipped with functioning CO detectors.

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