Wildfire smoke from Canada causes air quality concerns in Midwest.

Iowa has issued an air quality advisory due to the return of Canadian wildfire smoke, causing hazy skies and unhealthy air quality levels throughout the state. The smoke contains high concentrations of pollutants, including carbon monoxide and particulate matter, which can cause health defects such as chronic bronchitis, asthma attacks, and decreased lung function. The air quality is expected to be worst in the eastern third of the state, and residents are advised to limit time spent outside or wear a mask for prolonged periods spent outdoors.