The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

The map pulls data from air monitors, hundreds of pollution sensors, and forecast models to provide real-time air quality index (AQI) readings for more than 1,000 locations. Los Angeles’ air ...

And how did they work it out? So, what makes the US’s situation so precarious? Well, not to state the obvious, but a lot of it is because of all the air pollution. It turns out the air in the US ...

Meteorologists at the National Weather Service have issued a string of "air stagnation advisories" to warn residents to brace for increased levels of pollution due to the weather conditions.

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