Network Rail bans steam trains from running after ‘Harry Potter’ train sparks wildfire - The grounding has led to service cancellations, and diesel engines being brought in as last-minute replacements

Wildfires in Canada are pouring thick clouds of smoke into the US and will usher in unhealthy air quality for millions of people in Northeast and Midwest.

Dangerous wildfire smoke is filling the skies from the Midwest to the Mid-Atlantic. And in some areas, conditions are expected to worsen. Through Friday, more than 115 million people are forecast to be exposed to air quality levels that are unhealthy or worse as winds funnel smoke south from out-of-control fires in Canada and Minnesota — and a heat dome traps that smoke near the ground.

How worried should you be about wildfire smoke? Wildfire smoke isn't just a nuisance; a study from the Yale School of Public Health links wildfire smoke it to thousands of deaths a year in the U.S., mostly by aggravating heart and lung disease. While a ...

Millions of Americans across major cities continued to face dangerous air conditions on Friday as smoke from Canadian wildfires lingered. Tom Hanson reports.

Officials in many cities urged residents to stay inside or wear masks outside as air quality reached unhealthy to hazardous levels, meaning it’s unhealthy for anyone, regardless