Air quality warnings show PM2.5 particles at dangerous levels. Learn why today's hazy sky is a toxic soup that's damaging ...

That smoke smell is not a Father's Day barbecue you're missing. The smoke, haze and ash permeating the Philadelphia region on ...

The worst air in the country on June 14 is in New Castle County. The air quality index in Wilmington as of 9:45 a.m. was 227, which is "very unhealthy," according to AirNow. A monitor in Newark was at ...