The Swampscott Fire Department is attempting to raise awareness about carbon monoxide safety in the aftermath of three Nahant deaths that came as a result of poisoning from the gas earlier this month.

Nahant Police and Fire Department responded to a home on Cottage Street to conduct a well-being check on Monday, Jan. 8. John Benson, 77, his sister-in-law Youngae Benson, 74, and his nephew Andrew Carruth, 45, were all found dead in the home. It was soon discovered that the home had elevated levels of carbon monoxide.

The Swampscott Fire Department released a presentation on the town’s website that explains the potential sources, causes, and symptoms of carbon monoxide poisoning. Chief Graham Archer explained how winter can be the season in which the danger is highest.

“It’s not uncommon that there are carbon monoxide emergencies in this part of the country at this time of the year,” Archer said. “It’s often related to heating equipment as well as, when power’s out, misuse of gasoline-powered generators.”

He added that most modern-day homes vent their furnaces and boilers through the side of the home, which can lead to snow inhibiting the exhaust vents.

“If you’re looking at your neighbor’s heating system and you notice their exhaust is being encroached by snow… you should let your neighbor know,” Archer said.

Archers echoed the presentation’s focus that carbon monoxide poisoning is not always fast in its effects, and recognizing the early warning signs can save lives. According to the presentation, some first symptoms of exposure include headache, breathlessness, dizziness, fatigue, and nausea. Archer implores anyone experiencing those symptoms to remove themselves from their residence and reach out to the fire department.

Since 2006, carbon monoxide detectors have been required in all homes in Massachusetts. Archer believes that Swampscott is well-informed and aware of the dangers of carbon monoxide poisoning but said there is always room for further emphasis.

“Over the years, we have had multiple incidents of carbon monoxide poisoning in town,” Archer said. “A lot of people are unaware of how much an invisible killer carbon monoxide can be… it’s a message that we just continue to hammer and get out there.”