Hundreds of wildfires still burning in Canada are expected to undermine air quality across the Upper Midwest and Northeast into Tuesday.

The summer of 2025 has brought some of the worst air quality ever recorded to large parts of the United States. Cities across the Midwest and Northeast—especially Chicago, Detroit, Cleveland, New York City,

Syracuse, N.Y. -- Smoke streaming in from still-burning wildfires in Canada will lead to unhealthy air quality today across Upstate New York. The air quality index, a measure of fine airborne particles that can burrow deep into lungs, will be just above 100 today, according to the state Department of Environmental Conservation.