Air quality alerts as wildfires spread, caring for an aging population, and more

Canada’s biggest city is topping the wrong kind of chart of major cities with the worst air quality. The air is thick with a yellow haze and the smell of smoke is everywhere. And some places have it even worse. The culprit: wildfires burning across the country.Also: The country’s population is aging rapidly, putting more pressure on specialist care. But seniors are struggling to get access to specialists, which can lead to life-threatening consequences.Plus: WestJet flight attendants vote to strike, Trump’s choice for attorney general grilled at senate, Bank of Canada governor sees signs of economic growth, and more.