Wildfires in Canada are sending heavy smoke across the northern U.S., and New Jersey is experiencing some unhealthy air ...

Hot and humid weather conditions will come to an end for the Greater Toronto and Hamilton areas and eastern Ontario by ...

Air quality alerts are in effect on Tuesday in 10 states as toxic smoke from hundreds of wildfires burning in Canada ...

Smoke from hundreds of wildfires in Canada is lingering over the northern U.S., spreading across to roughly a dozen states ...

Another air quality alert is in effect Tuesday for NYC, western Long Island, the Hudson Valley, northwest New Jersey and ...

The air quality in several U.S. states is taking a hit as smoke floats over the border from the Canadian wildfires. Here's ...

MINNEAPOLIS (FOX 9) - An air quality alert has been issued for all of Minnesota starting Sunday due to wildfire smoke from ...

With hundreds of wildfires burning across Canada, smoke has drifted into the northern United States, lowering air quality ...

The air quality index, or AQI, measures the air quality and level of health concern it presents as measured by the Environmental Protection Agency. The AQI is measured on a scale of 0 to 500.

An air quality alert has been issued for the New York metro area Tuesday, Aug. 12, as high temperatures contribute to increased ozone levels.

An air quality advisory is in effect for the Lower Peninsula of Michigan due to wildfire smoke from Canada. Sensitive groups, such as those with respiratory issues, should limit outdoor activities.

In Lansing, as of 10 a.m. on June 4, AirNow's Air Quality Index reflected a "moderate" reading with a PM2.5 of 81 — meaning the sensitive groups may be harmed by poor air quality, and people ...