US Air Quality Alerted by Canadian Wildfires and Wildfire Smoke Shifts South.

Air quality alerts remain in place in the US due to smoke from Canadian wildfires, although conditions have improved in some areas. The smoke has caused hazy skies and reduced visibility in regions from the Great Lakes to the Mid-Atlantic United States, with poor air quality levels continuing to affect millions of Americans. Experts warn that the problem of pollution from wildfire smoke will continue in years to come, and may only get worse because Canada's forest fires are growing. People are advised to avoid strenuous activity and outdoor exercise and wear a mask to filter out harmful particles. Schools in some areas have gone remote due to poor air quality warnings.