Smoke drifting south from Canadian wildfires has made skies in Pennsylvania and other states hazy this week. The Pennsylvania ...

California’s air quality alert, affecting over half a million people, has advised residents to avoid burning candles, incense, and using fireplaces.The warning is issued in ...

Code Yellow Air Quality or the moderate level for particle pollution is forecast for Saturday and Sunday. This may cause health symptoms for groups of people in the unusually sensitive category.