PORTLAND, Maine — Smoke from Canadian wildfires worsened air quality in the eastern U.S. on Wednesday as several Midwestern ...

The Maine Department of Environmental Protection issued an air quality alert for Wednesday and Thursday due to ozone levels ...

Smoke from several Canadian wildfires has drifted into the Bay Area, causing officials to warn of worsening air quality ...

An air quality alert goes into effect along the coastline beginning at 11 a.m. on Wednesday running through 11 p.m. Thursday.

More than 200 wildfires are raging across Central and Western Canada. That smoke is creating hazy skies in New England and prompting some air quality alerts.

While the smoke may cloud your vision of the sky or ruin a day at the beach on this week's warmest days of the season so far, ...

An air quality map shows conditions across the United States on Wednesday as Canadian wildfire smoke is forecast to continue ...

Air in the U.S. has gotten cleaner for decades, adding years to people's lives and preventing millions of asthma attacks, but nearly half of Americans still live with unhealthy air pollution, a new ...

Early in the morning, Google’s air quality map showed that Chicago had the worst air in the country. Apple’s weather app, too, showed that the Air Quality Index had climbed into the 400s ...

Languages: English. The red-level air quality index (AQI) category—covering values from 151 to 200—means the air is unhealthy for everyone, not just vulnerable populations. According to the ...