Canadian wildfires are shrouding US cities in smoke and yellow haze. See the eerie photos.

New York City is among the cities covered in smoke from Canadian wildfires. Gary Hershorn/Getty Images Over 800 wildfires are burning across Canada, polluting multiple cities with thick smoke. Winds carried the smoke southeast, causing air quality alerts due to unhealthy smoke levels. Toronto, New York City, Chicago, and Minneapolis are among the cities covered in the smoky haze. It's not an Instagram filter. The skies really are that yellow. Smoke from more than 800 active wildfires burning…