Unhealthy air, smoke continue to cover large swaths of US for third straight day
Large swaths of the U.S. continue to be blanketed in a thick haze of smoke from hundreds of forest fires burning in Canada, with Thursday marking the third day of unhealthy and hazardous air quality conditions that have snarled air traffic, forced the cancellation of events and prompted numerous health advisories.
The smoke billowing across the border led officials in several states across the Great Lakes region and the Ohio Valley stretching
