Massive Canadian wildfires are bringing particulate matter and the smell of smoke into North Carolina and Virginia.

Heavy smoke from several large wildfires blazing in Canada and Minnesota is engulfing large swaths of the Midwest and Northeast U.S. this week.

Poor air quality has been dominating the headlines in southern Ontario this week after a combination of smoke from wildfires and intense heat created orange, hazy skies and resulted in some of the poorest air quality readings on the planet.

Wildfire PM2.5 differs from routine air pollution by composition, with higher elemental and organic carbon fractions that increase free-radical burden and intensify oxidative stress–mediated lung inflammation.

Wildfire smoke from fires burning in Canada and northern Minnesota has been pouring across the Great Lakes and northeastern U.S. states, turning skies an eerie shade of orange. In the West, smoke has also been spreading into communities in Colorado and neighboring states as more wildfires burn in hot,

Wildfire smoke from Canada is affecting air quality across Pennsylvania and the Northeast. See today's smoke maps and forecast.

Smoke from wildfires in Canada and Minnesota is sending air quality indexes to record levels, posing a hazard for millions of people. Here are tips for how to breathe easier in your home.

Wildfire smoke covering Michigan may not smell like a pleasant campfire because of chemical compounds in the smoke. Why it's a health risk.

As larger, more frequent fires continue to send smoke hundreds (or even thousands) of miles across the country, poor air quality is now a reality for many. Even short-term exposure to wildfire smoke can irritate your eyes,