Smoke from Canadian wildfires has returned to various parts of the Northeast and Midwest, prompting air quality alerts from New York City to Minneapolis. Reports indicate that the hazardous smoke will darken skies over several states, creating unhealthy conditions. Areas such as Chicago, Philadelphia, and parts of Michigan are under significant alerts, as the air quality index reflects dangerous levels. The smoke has even resulted in an eerie orange haze, raising health concerns among residents. Wildfires continue to burn in Ontario and northern Michigan, further exacerbating the situation as millions are exposed to contaminated air.