Are you planning to attend Lollapalooza today? Here are a few things to keep in mind, as you’ll be outdoors for an extended period: Chicago currently has the worst air quality in the world.
The Environmental Protection Agency issued an Air Quality Alert for most of the Chicago area, which is in effect until midnight.
The air quality alert comes due to Canadian wildfire smoke making its way into the area. According to IQAir.com, Chicago is the worst in the world at 11:30 a.m.

Chicago air quality alert
According to ABC7, “the smoke also causing low visibility in some areas due to it coming down to the lower levels of the atmosphere.”