Air quality has taken a serious hit across the United States as a twofold blow of wildfires in the West and in Canada have sent smoke pouring across large sections of the country — a problem that’s set to linger for days.

The wildfire areas of Manitoba and Saskatchewan are projected to receive 50 millimeters to 100 millimeters of rain this weekend into early next week. That amount of rain converts to two inches to four inches of rain. Two to four inches of rain will do a lot to extinguish a wildfire.