NYC air quality reaches unhealthy 'Level Red' — after out-of-control Canadian wildfires contaminate US airspace

New York City air quality has reached a very unhealthy level as smoke from Canadian wildfires drifts south. The city hit Level Red on the Air Quality Index for most of Thursday, eventually shifting to Level Purple by the evening. This puts New York in a situation where the air is notably worse than in Delhi, a city that typically records the highest pollution levels globally.

Mayor Zohran Mamdani advised residents to minimize outdoor time and avoid strenuous physical activity while these conditions persist. The city has made KN95 masks available at firehouses, police precincts, and public libraries to help residents protect themselves from the poor air quality.

A heat dome currently parked over the region is trapping the smoke close to the ground, which keeps the pollution from dispersing. With temperatures in the tri-state area nearing 100 degrees, the combination of extreme heat and heavy haze creates a dangerous environment for vulnerable groups. Statewide health advisories remain active as officials monitor the situation.

Over 800 wildfires are currently burning across Canada, with dozens classified as out of control. Weather forecasts suggest conditions may improve slightly on Friday morning, but the air quality is expected to decline again as the weekend begins. Residents are encouraged to check for updates and follow safety guidance from local agencies until the haze subsides.