Tennessee OSHA Warns of Increased Carbon Monoxide Risks as Temperatures Drop
The agency urges employers to take precautions when using fuel-burning equipment as colder weather increases the potential for workplace carbon monoxide exposure.
- By Danielle Naidu
- Oct 09, 2026
The Tennessee Occupational Safety and Health Administration (TOSHA) is reminding employers and workers to recognize the dangers of carbon monoxide exposure as colder temperatures increase the use of fuel-burning equipment in workplaces.
In a seasonal safety advisory, the agency warns that portable generators, gas overhead heaters, propane-powered forklifts, gas-powered pressure washers, portable gas heaters and vehicles left running indoors can create hazardous conditions, particularly in enclosed or poorly ventilated areas.
Carbon monoxide is a colorless, odorless and tasteless gas produced when fuels such as gasoline, diesel, propane, natural gas, kerosene or wood are burned. Because the gas cannot be detected by human senses, workers may be exposed without realizing it.
According to TOSHA, carbon monoxide hazards become more common during colder weather as workers close building openings, including windows and doors, to retain heat. Reduced airflow can allow the gas to accumulate inside buildings and other enclosed spaces.
Recognizing Exposure Symptoms
Early symptoms of carbon monoxide exposure can resemble common illnesses, making the hazard difficult to recognize. Symptoms include headaches, dizziness, nausea, weakness, confusion and drowsiness.
As exposure increases, symptoms can progress to loss of coordination, unconsciousness and death.
TOSHA advises employers to take several precautions to reduce workplace exposure risks:
- Use equipment properly. Follow manufacturers' recommendations and never operate fuel-burning equipment in enclosed or poorly ventilated areas unless it is designed for that environment.
- Maintain equipment. Ensure efficient combustion and reduce emissions through regular maintenance.
- Provide adequate ventilation. Opening a door or window may not provide sufficient protection against carbon monoxide accumulation.
- Use carbon monoxide monitoring. Where appropriate, install monitors to identify hazardous concentrations before they reach dangerous levels.
- Train employees. Ensure workers recognize symptoms of exposure and understand the importance of reporting them immediately.
If carbon monoxide exposure is suspected, TOSHA advises workers to move to fresh air immediately, seek medical attention if needed and identify and correct the source of exposure before work resumes.
The agency also encourages employers to evaluate workplace conditions before colder weather arrives, particularly in facilities where portable heating equipment or fuel-powered machinery is used.
Additional information on carbon monoxide hazards and prevention is available through the Centers for Disease Control and Prevention and OSHA.
About the Author
Danielle Naidu is assistant editor for Security Today, Campus Security Today, Occupational Health & Safety and Environmental Protection Online.