DES MOINES — As colder weather settles across Northern Iowa and residents begin relying on furnaces, fireplaces and other heating equipment, state officials are warning families about a potentially deadly threat that cannot be seen, smelled or tasted: carbon monoxide.
On Thursday, November 5, 2026, Iowa State Fire Marshal Dan Wood urged residents to inspect their heating equipment, check carbon monoxide detectors and take precautions against poisoning as winter approaches.
Governor Kim Reynolds has proclaimed November 2026 as Carbon Monoxide Awareness Month, drawing attention to a dangerous gas that can be produced when fuel-burning equipment malfunctions or is improperly operated.
Carbon monoxide, commonly called CO, is produced when fuels such as natural gas, propane, gasoline and wood do not burn completely. Because the gas is colorless and odorless, dangerous concentrations can accumulate inside a home without residents realizing anything is wrong.
“As we head into winter months, it’s important Iowans make sure their homes are equipped with working carbon monoxide and smoke alarms,” Wood said. “Heating equipment should also be inspected and in good working order. Carbon monoxide can be deadly, but taking a few simple precautions can help ensure a safe winter season.”
Carbon monoxide scare in Charles City shows danger is real in North Iowa
The warning carries particular significance in Northern Iowa, where winter temperatures often require heating systems to run for extended periods.
In January 2024, NorthIowaToday.com reported on a carbon monoxide scare at a Charles City home after emergency personnel investigated possible exposure.
In December 2022, Mason City officials urged residents to test carbon monoxide alarms and keep heating vents clear of snow and ice during a major winter storm.
Blocked vents, faulty furnaces and improperly operated fuel-burning equipment can create hazardous conditions as homes are shut tightly against the cold.
Five precautions that could save your family from carbon monoxide poisoning
Install and test carbon monoxide alarms. Every level of a home should have a carbon monoxide alarm, including locations outside sleeping areas. Test them regularly and replace them according to manufacturer guidance.
Have heating equipment inspected. Furnaces, fireplaces and other fuel-burning appliances should be inspected and serviced by qualified professionals.
Keep portable generators outdoors. Never operate generators inside houses or garages. Keep them outdoors at least 20 feet from windows, doors and vents.
Never idle vehicles inside garages. Carbon monoxide can accumulate in a garage even when its door is open, potentially spreading into living areas.
Recognize the warning signs. Headaches, dizziness, nausea, weakness and confusion can indicate carbon monoxide exposure. Do not dismiss those symptoms, especially when multiple people in the same building are affected.
In earlier coverage, NIT reported on an Alliant Energy warning about the dangers of colorless, odorless carbon monoxide gas and the importance of working heating equipment.
What to do if a carbon monoxide alarm sounds
If a carbon monoxide alarm sounds or poisoning is suspected, immediately move everyone outside into fresh air and call 911. Do not reenter the building until emergency responders say it is safe.
Carbon monoxide exposure can be especially dangerous for pregnant individuals, infants, older adults and people with certain underlying health conditions. Severe poisoning can cause unconsciousness or death.
Northern Iowa homeowners urged to prepare before temperatures plunge
For homeowners in Mason City, Clear Lake, Charles City, Forest City, Garner and rural Northern Iowa, now is a good time to inspect equipment before the coldest months arrive.
The state has also stressed fire prevention alongside carbon monoxide safety. In earlier coverage, NIT detailed winter home-fire prevention recommendations from the State Fire Marshal.
The State Fire Marshal Division encourages Iowans to check detectors, arrange necessary furnace inspections and review basic safety precautions before an emergency develops.
Additional guidance is available in the Iowa Department of Public Safety’s November 5 carbon monoxide safety announcement.