By Marlene Lenthang and Phil Helsel - NBC News
After a day of orange fog hovered over New York City, darkening some of the country's best-known landmarks with smoke from Canada's wildfires, New Yorkers and locals await another day of stale air.
Smoke in major metropolitan areas, including Boston, Philadelphia and Washington, D.C., will continue through Thursday and cause unsanitary air for all groups, according to the National Weather Service.
There were air quality warnings in all five boroughs of the city of more than eight million people, with Mayor Eric Adams calling the situation unprecedented.