Two people from New York were found dead in their cars on Monday, and the authorities were investigating whether their deaths were related to the weekend blizzard.

The New York Police Department said Angel Ginel, 44, was found unconscious in the driver’s seat of his white Lexus around 4:40 p.m. in Sunset Park, Brooklyn. Emergency responders pronounced him dead at the scene.

A police spokesman said emergency workers found signs that Mr. Ginel, of Park Slope, Brooklyn, had likely died of carbon monoxide poisoning, including that his car’s tailpipe was blocked by snow. An official added that the car key was in the ignition and turned to the on position.

The medical examiner will determine the cause of death, the police said.

The authorities were trying to determine what killed a 78-year-old woman from New York State who was found dead in her Cadillac parked at a Burger King in Hackensack, N.J., around 8 a.m., according to The Record, a northern New Jersey newspaper.