Washington DC will spend most of Friday with a Code Red or Code Purple air quality rating, meaning air pollution has reached levels that are unhealthy or very unhealthy.
A thick blanket of Canadian wildfire smoke has enveloped the DC area, dramatically reducing visibility and giving the sky a milky, gray appearance.
Sensitive groups, including older adults, children and people with heart or lung disease, have been urged to avoid physical activities outdoors. Everyone else could also feel the effects from the air quality, with health experts encouraging those people to avoid strenuous outdoor activities and keep outdoor activities short…