With hundreds of wildfires burning across Canada, smoke has drifted into the northern United States, lowering air quality across roughly a dozen states.

The Wisconsin Department of Natural Resources re-extended its air quality alert statewide as wildfire smoke lingers.

Over the weekend, the New York State Department of Environmental Conservation (DEC) issued an air quality health advisory for much of Upstate New York. This isn’t the first this year—and it likely won’t be the last.