Health officials from Minnesota to Maine have issued alerts warning of poor air quality from wildfires burning in Canada. People are advised to limit outdoor exposure.

Air quality concerns grip Wisconsin as Canadian wildfire smoke continues to affect the region. The air quality advisory was extended from Monday until Tuesday at noon. A combination of jet stream patterns and surface-level high pressure is pushing the smoke into the United States,

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.