An air quality alert covering the entire state of Minnesota continues on Thursday, marring otherwise fairly ideal weather conditions.

Air quality alerts have been issued across most of the Midwest, and hundreds of wildfires are burning across Canada.

Canada is battling more than 700 active wildfires across the country, roughly two-thirds of which are burning out of control, according to the Canadian Interagency Forest Fire Center (CIFFC). Smoke billowing from the blazes has blanketed central Canada and the northern U.S., prompting widespread air quality alerts.