Three people are being treated for carbon monoxide poisoning Wednesday morning. Green Bay Fire Fighters were called to a home on Deer Trail early just before 2 a.m. for the report of a sick child. When firefighters entered the home, a carbon monoxide detector on one of the firefighters EMS bag went off. Upon checking the levels in the home, crews found extremely high levels above 1000 ppm of carbon monoxide. After finding an unconscious child, the home was evacuated and all people in the home were treated, and two were taken to an Appleton hospital for additional treatment in a hyperbaric chamber.