Having breathing trouble today? Canadian wildfire smoke is drifting across Ohio today, dropping the air quality in parts of the state. What to know.

Wildfire smoke from Canada has prompted officials to place the Lehigh Valley and surrounding counties under an air quality alert Tuesday.

Flights at Logan airport were operating on a delay of 52 minutes due to low visibility on Monday afternoon, according to an advisory from the Federal Aviation Administration. Earlier on Monday, there was a brief ground stop at the airport "due to smoke and haze impacting operations," according to the FAA.