An air quality advisory for Long Island is the result of smoke from Canada wildfires, New York State officials say.

Wildfires scorching several Canadian provinces have driven at least 33,400 people from their homes, with smoke now reaching all the way to Europe.

The fires’ consequences are not just being felt locally, but internationally. Smoke from the wildfires has drifted across the Atlantic Ocean, turning skies above the United Kingdom orange. The fires’ smoke may also be uniquely toxic due to the country’s heavily mined forests.

So far this year, wildfires in Canada have burned over 8 million acres, more than the country typically sees in a year. The massive fires are contributing to heavy smoke that is now spreading across the United States Northern Tier.

From mental health impacts to heightened risk of infections, recent studies underscore the myriad ways in which smoke exposure affects our health.

An overcast Monday is in store for Massachusetts residents as wildfire smoke lingers through the chilly temperatures — and there might be rain. Here's what to expect.

Children, older adults, and people with respiratory or heart conditions such as asthma or COPD may begin to experience health effects, according to officials.