Overview

• A 47-year-old woman called 911 just before 10:30 p.m. Sunday in Garfield, Minnesota, reporting heart-attack-like symptoms before her 49-year-old husband showed signs of a possible seizure.
• First responders transported the pair to Alomere Hospital in Alexandria, and they were later flown to another facility for further treatment, with their conditions not released.
• A technician measured dangerously high carbon monoxide levels inside the home after the evacuation, according to the Douglas County Sheriff's Office.
• Officials say the likely source was a furnace and water heater found out of code compliance, and the couple had just turned on their furnace for the season.
• It remains unclear whether working carbon monoxide detectors were present; Minnesota requires detectors near sleeping areas, and the CDC reports about 400 accidental CO deaths and 14,000 hospitalizations in the U.S. each year.