An air quality advisory is in effect for New York City as smoke from Canadian wildfires continues to impact the region’s air, prompting health warnings.

Wildfire smoke from Canada has prompted officials to place the Lehigh Valley and surrounding counties under an air quality alert Tuesday.

Air quality has taken a serious hit across the United States as a two-fold 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.