Carbon monoxide deaths claim four lives in Chicago and Hillsdale cases

Two people died in separate carbon monoxide incidents: a 37-year-old man and 39-year-old woman were found inside a running vehicle in a closed Chicago garage, and a 78-year-old man and his grandson died at their Hillsdale County, Michigan, home. Authorities attributed the Chicago deaths to accidental inhalation of vehicle exhaust; in Michigan, investigators reported carbon monoxide poisoning, with local coverage citing an improperly serviced water heater as the suspected source. Reports said the Michigan home had no working carbon monoxide detectors, and the exact circumstances remain under investigation. Michigan officials used the deaths to emphasize installing and testing CO detectors and maintaining fuel-burning appliances.