New York City, Long Island and the Hudson Valley will all experience air quality within the 101-150 range on the air quality index Sunday, the state’s Department of Environmental Conservation forecasted—meaning the air could contain fine particles and could be “unhealthy for sensitive groups.”

Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

Officials warned young children and those with respiratory illnesses to take precautions. For weeks, smoke from Canadian wildfires has been drifting across the border.

Wildfire smoke from Canada has triggered air quality alerts across New York and the Northeast, with hazy skies and unhealthy conditions expected through today.

The smoke is expected to remain over the northern and central Plains of the United States for the next couple of days, according to meteorologists.

Meanwhile, the Midwest is getting blanketed in wildfire smoke from Canada, leaving millions under dangerous breathing conditions as more than 650 wildfires are burning in Canada, with 275 labeled as “out of control.