Delaware is under a Code Red air alert due to smoke from Canadian wildfires. What does a code purple mean and what is AQI?

Canadian wildfire smoke has caused air quality in Washington DC to go beyond Code Red into Code Purple, "Very unhealthy" levels.

Smoke from wildfires in Canada and Minnesota have pushed Philadelphia into a Code Purple Air Quality Alert Friday. The status is a step up from Thursday's code red conditions, now pausing trash ...

Wildfire smoke from Canada and Minnesota has led to a Code Purple alert for Pennsylvania on July 17. See the air quality map.

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US air quality map: A Code Purple alert for poor air quality has been declared in Philadelphia due to smoke from wildfires in ...

The Pennsylvania Department of Environmental Protection has declared a statewide Code Purple air quality alert for ...

After failing to pass doping checks, Pakistani all-rounder Mohammad Nawaz gets a three-match doping ban before the series.

The Metropolitan Washington Council of Governments has issued a Code Purple air day in the metropolitan Washington region Friday due to drifting smoke from Canadian wildfires. A Code Purple levels ...

The British Open is underway in Southport, England, and MLB is back in action tonight with the Mets vs. the Phillies. No ...