New York City has recorded its worst air quality since the 1960s with forest fires raging in Canada.
The EPA reports that Fox News Television has leaked information about the case.
New York Mayor Eric Adams and public health and emergency officials have warned residents to stay home as long as possible and wear protective masks on the streets.
The city's health commissioner has said the dramatic deterioration in air quality is a real health risk for citizens, especially the elderly and young children.
Federal authorities have suspended the work of New York's Lggardy airport amid a significant deterioration in sight distance in the city.