“March 17, 2014, started off just like any other day: I dropped off my five-year-old son Ryan at the Douglas Municipal Center, adjacent to the Douglas Elementary School. He hurried inside the municipal center, where kindergarten is held, along with 76 other kindergartners and their teachers. The weather was cold, so the building’s heating system was on. No one realized that somewhere inside the building a furnace was leaking a deadly gas and everybody inside was in danger.”
https://www.telegram.com/opinion/20161004/as-i-see-it-why-schools-need-carbon-monoxide-detectors