Six Flags Great America was forced to shut down as smoke from Canada’s devastating wildfires continued to blanket parts of the US, creating unhealthy air conditions across the Chicago area. Six Flags Great America and Hurricane Harbor Chicago in Gurnee, Illinois, closed Friday over the unhealthy air quality conditions in Chicago due to the disaster, the company announced on its website. Officials expect the park to reopen Saturday, pending improving conditions, according to People, citing a park spokesperson. “Due to current air quality conditions and guidance from weather and safety experts, we have made the decision to close the park…