Smoke from Canadian wildfires is pouring into the U.S. East Coast and Midwest and covering the capitals of both nations in an unhealthy haze.It's delaying some flights Wednesday, sending school recesses indoors, forcing the cancelation of events and prompting people to fish out pandemic-era face masks.Canadian officials have expanded evacuation orders and asked other countries for help fighting more than 420 fires nationwide.Meanwhile, air quality with what the U.S. rates as “hazardous” levels of pollution has extended into central New York, with massive tongues of “unhealthy” air extending as far as Virginia and Indiana.A National Weather Service meteorologist in Maryland, Zack Taylor, says weather conditions that could blow away the smoke won't change for a few more days.