After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free ...

The Air Quality Index does not take into account many gas or particle contaminants ... such as the PurpleAir network, which ...

The LA wildfires have burned tens of thousands of acres – but on some weather maps, air quality still looks good. What’s ...

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily ...

They are not measured by the Air Quality Index — and they’re extraordinarily toxic,” California Communities Against Toxics executive director Jane Williams said in a recent public briefing.

Government measures fall short, experts say, as air quality index (AQI) readings become more hazardous in Thai capital.

Those groups particularly sensitive to particulate matter in the air may want to limit time outside Friday and Saturday.

Wear a tight-fitting N95 mask at the bare minimum, but a P100 is better, experts say. Wear long sleeves, eye protection, closed-toed shoes and cut-resistant gloves. Clean or decontaminate anything ...