New York forecast to have worse-quality air than Delhi as wildfire smoke engulfs city

When will wildfire smoke clear? Here’s where air quality will get better (or worse) this week

Wildfires burning in Canada and Minnesota sent smoke blowing over a huge swath of the U.S. on Wednesday, giving the sky an apocalyptic haze. The smoky skies are likely to linger – and even worsen – in the next couple days before there's a chance of improving.