Maryland is under a Code Red air quality alert as wildfire smoke moves into the region, with Code Purple conditions expected in Western Maryland and unhealthy air forecast through much of Saturday.
Canadian wildfire smoke has caused air quality in Washington DC to go beyond Code Red into Code Purple, "Very unhealthy" levels.
Air quality alerts can change quickly during wildfire smoke events. Here’s what Code Orange, Code Red, Code Purple and Code ...
The Pennsylvania Department of Environmental Protection issued a statewide Code Red Air Quality alert as wildfire smoke moves ...
Need to know how to check the air quality in Philly, or check code red guidance? Read here.
Delaware is under a Code Red air alert due to smoke from Canadian wildfires. What does a code purple mean and what is AQI?
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