Health authorities are reminding the public and healthcare professionals to stay alert to the dangers of carbon monoxide poisoning, particularly during winter when heaters and other fuel-burning appliances are used more frequently.

Carbon monoxide is a colourless and odourless gas produced when fuels such as gas, wood, petrol, diesel, kerosene, and tobacco are burned. Because it cannot be seen or smelled, exposure can occur without warning.

Common sources include gas heaters, wood heaters, gas cooking appliances, barbeques, portable generators, patio heaters, hot water systems, and vehicle exhaust fumes. Faulty appliances or poor ventilation can increase the risk of dangerous carbon monoxide build-up indoors.

Symptoms are often difficult to recognise because they can resemble common illnesses such as the flu or food poisoning. Signs may include headaches, nausea, vomiting, dizziness, weakness, shortness of breath, confusion, chest pain, and difficulty concentrating.

In severe cases, carbon monoxide poisoning can cause loss of consciousness, seizures, permanent injury, or death.

Children, pregnant women, older adults, people with heart or lung conditions, and pets are considered particularly vulnerable to serious health effects.

Health authorities advise that anyone who suspects carbon monoxide exposure should immediately turn off gas appliances, open doors and windows, leave the property, and seek medical attention. In an emergency, call 000.

Residents are also encouraged to have gas heaters serviced and tested every two years by a licensed gas fitter and to avoid using outdoor heating or cooking appliances inside homes, caravans, or other enclosed spaces.

Healthcare professionals are being reminded to consider carbon monoxide poisoning when patients present with unexplained flu-like symptoms, especially if symptoms improve when away from home or affect multiple household members.

The warning comes as winter heating use increases and follows ongoing safety advice regarding faulty or poorly maintained heating appliances.

Health Warning Issued on Carbon Monoxide Poisoning Risks

Source: Victorian Department of Health Advisory, updated 24 June 2026