Monday's air quality has dropped to unhealthy levels in Las Vegas, when the AQI index is between 151 to 200. Anyone outdoors could experience adverse health impacts.

Highs will stay below seasonal average with temperatures only reaching the low 70s and mostly cloudy skies Tuesday.

Smoke from Canadian wildfires will affect much of eastern and central Pennsylvania today, Tuesday, Aug. 5. The Pennsylvania Department of Environmental Protection has declared a Code Orange Air ...

Winds were pushing smoke toward Seattle — similar to an earlier wave over the weekend. This round of smoke will likely stick ...

Canadian wildfire smoke is plaguing Pennsylvania once again. The state’s Department of Environmental Protection declared a ...

Smoke from wildfires burning in Canada is filling the skies high above New Hampshire, triggering concerns about the air quality.

Forecasters say weak winds have left Canadian wildfire smoke to linger over the U.S. Stronger winds are expected to bring ...