That smoke has made its way to the US, primarily affecting air quality in parts of the Midwest, the East, and the North. Be ...

Air quality alerts can change quickly during wildfire smoke events. Here’s what Code Orange, Code Red, Code Purple and Code ...

(WHTM) — If you thought air quality was bad in Code Red conditions, there are two worse levels. The Pennsylvania Department ...

A "Code Purple" alert is the second-highest level of the Air Quality Index and signifies a "very unhealthy" level of air ...