Canadian wildfires: Hazardous smoke hangs over Canada, US

NEW YORK — Smoke from Canadian wildfires poured into the U.S. East Coast and Midwest on Wednesday, covering the capitals of both nations in an unhealthy haze, holding up flights at major airports, postponing Major League Baseball games and prompting people to fish out pandemic-era face masks. While Canadian officials asked other countries for additional help fighting more than 400 blazes nationwide that already have displaced 20,000 people, air quality with what the U.S. rates as hazardous levels of pollution extended into central New York, northeastern Pennsylvania and, later, the...