Canadian wildfire smoke has once again descended into Wisconsin, threatening some physical impacts for sensitive groups.

Outdoor air in Lower Hudson Valley is predicted to contain pollutants that exceed safe levels June 12, the NWS says.

Columbus' air quality is once again expected to become unhealthy for sensitive groups on June 12 due to smoke and ozone production, according to the Mid-Ohio Regional Planning Commission.

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Rain overnight in Calgary did little to clear the wildfire smoke affecting the city, leading to an air quality warning early ...

The state has issued an air quality alert for June 12, particularly because of high levels of ozone, which can be dangerous for vulnerable populations ...

Smoke traveling from wildfires in Canada, North Dakota and Minnesota triggered an air quality warning in northern Wisconsin.

An air quality alert is in effect on Thursday in Minnesota as more showers and a few strong storms could lead to heavier downpours Thursday night.

(KNSI) — Smoke from large wildfires in Canada is once again blowing into Minnesota, making the air unsafe for some people to ...

An air quality advisory for Long Island is the result of smoke from Canada wildfires, New York State officials say.

As Alberta faces the prospect of another wildfire smoke-filled summer, experts are urging people to monitor conditions and ...