Wildfire Smoke from Canada Continues to Impact U.S. Air Quality

Smoke from wildfires in Canada continues to cause smoky conditions and poor air quality across the Midwest and Northeast regions of the United States. The Air Quality Index in several cities, including New York City, reached "unhealthy" levels, prompting warnings and precautions. Thunderstorms are expected to help disperse the smoke and improve air quality over the Fourth of July weekend, but the effects may persist for weeks as Canada's wildfire season started early this year.