Explainer-What are the health risks from wildfire smoke?

Canadian wildfires prompt new evacuations, alarm over air quality

From the US East Coast to the Canadian capital, millions will suffer unhealthy air quality today as wildfires in Quebec rage on

US states under air-quality alerts as Canadian smoke drifts south

Missouri man executed for killing two in botched jailbreak

Canada wildfires: Tens of millions under air quality warnings as fires burn

New York Yankees host Chicago White Sox in smoke-shrouded game following Canadian wildfires

Lululemon stands by decision to fire employees who intervened in robbery

New York City's air pollution among the world's worst as Canada wildfire smoke shrouds Northeast

USMNT rumors: Adams to Forest, Marsch to Celtic, Gutierrez to United

Fire on small cruise ship in Alaska forces evacuation of 67 people, Coast Guard says

Canada could see its worst wildfire season on record