Thick haze and extremely poor air quality are expected to blanket much of the Northeastern US and Midwest as wildfire smoke from raging wildfires in Canada and Minnesota continues to spread. Areas including Boston, Minnesota, and northern Michigan are under air quality alerts, with officials warning of unhealthy conditions. Evacuations have been ordered in parts of Minnesota due to the combination of wildfires and extreme heat. As the smoke drifts south and east, cities such as Toronto and Philadelphia are also affected, leading to air quality levels ranked among the worst globally. Residents are advised to prepare for dangerous air pollution and take necessary precautions as the smoke and heat persist.