Canadian Wildfires Impact Air Quality Across North America.

Smoke from dozens of wildfires in Canada's Quebec province is causing air quality problems across large parts of the U.S., with officials warning residents to take precautions. Canada is experiencing a particularly brutal wildfire season, with 2,214 wildfires burning over 8 million acres so far this year. Poor air quality alerts are in effect for several U.S. states, including New York, Minnesota, Wisconsin, Indiana, and North Carolina. Disaster preparedness experts advise staying indoors, using air filters, wearing masks, and avoiding strenuous activities, especially for vulnerable groups such as those with lung and heart disease, the elderly, and pregnant people.