Detroit, Minneapolis, and Chicago had the worst air quality in the world on July 16 due to heavy smoke caused by hundreds of wildfires in the United States and Canada.
The intense infernos prompted evacuations and health alerts for people living in both countries as fire crews worked around the clock to contain the flames.
But conditions could get worse.
Here is a look at where wildfires are burning and how health experts suggested you protect your home and family.
Canadian Wildfires
At least 858 active fires raged across Canada on Thursday, with 110 considered “out of control,” according to the Canadian Wildland Fire Information System. …