Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air for at least the third day. Air quality alerts were in effect in Iowa, Minnesota, Wisconsin and Michigan, as well as eastern Nebraska and parts of Indiana and Illinois. Forecasters said the smoky skies would remain for much of the day. People with lung disease, heart disease, children, older adults and pregnant women are most susceptible to the poor breathing conditions. MORE: https://www.wthr.com/article/news/nation-world/canadian-wildfires-smoke-air-quality-midwest/507-11c177de-cd6d-48e2-b158-e9c7dd303bb3