According to forecasters at AccuWeather, cities where smoke is expected to become thick enough to be noticeable include Fargo, North Dakota; Minneapolis and Duluth, Minnesota; Green Bay and Milwaukee; and Chicago, Illinois. Additionally, high-altitude wildfire smoke may be visible as far southeast as Detroit and Indianapolis.

The Minnesota Pollution Control Agency says additional air quality alerts are likely needed for much of Minnesota this weekend due to the heavy wildfire smoke in Canada moving into the upper Midwest.

States throughout the Midwest and into the Ohio Valley — including Michigan, Illinois, Indiana, Kentucky, Ohio, Tennessee, and West Virginia — could also experience moderate air quality on Monday, according to the EPA forecast. It could be a while before those with hazy skies see any relief.

Surface smoke could impact part of Minnesota beginning Thursday, and with fires burning out of control in Canada, it could be a smoky summer in the Land of 10,000 Lakes.

Smoke from Canadian wildfires is working its way into the northern U.S. this week, prompting warnings from health officials that air quality may become briefly unsafe.

Cool weather has provided a boost to crews fighting the wildfires in northeastern Minnesota. But after more than a week since the fires began, the fight is far from over.

Smoke from Canadian wildfires has blanketed northern Minnesota, prompting air quality alerts by the Minnesota Pollution Control Agency. On Thursday, heavy smoke and hazy conditions moved into the region from wildfires burning in southeast Manitoba and Saskatchewan.

Minnesota authorities warned of unhealthy levels of exposure to particles from wildfires. Symptoms include shortness of breath, heart attack. stroke.

This week's rain has given some respite from ongoing drought conditions, but as of May 15, a quarter of Minnesota is still in a moderate drought.

Smoke from 150-plus wildfires in Canada could affect air quality and cause health problems for Americans. Is Ohio in the path? What to know.

With state authorities now focused on wildfire recovery, officials warn that flames can still easily spread under the projected weather conditions.