The hazy skies in the Chicago area are the visible sign of the poor air quality on Thursday as smoke from Canadian wildfires drifts into our area, sending Chicago to the top of the list of most polluted cities in the world.
Behind the cold front that finally brought temperatures down from the suffocating heat and humidity that have enveloped the Chicago area for the last few weeks, hazy and smoky skies have filtered back in.
The Canadian wildfire smoke has traveled down to the surface, creating unhealthy air quality for everyone, and especially for people with health conditions or who are very young or elderly. Visibility is also poor, as low as two miles in some area…