According to the Center for Disease Control and Prevention (CDC), January is one of the most dangerous months for Carbon Monoxide (CO) poisoning.
CO is an odorless, colorless gas. This "silent killer" is found in fumes produced by furnaces, vehicles, portable generators, stoves, lanterns, gas ranges, or burning wood in a fireplace. CO can accumulate in buildings, garages, or any enclosed or partially enclosed areas and poison anyone inside.
You can help Prevent Carbon Monoxide Exposure with these tips from the CDC: