High risk air quality warnings have been issued for millions of people across North America due to the ongoing wildfires in Canada.
Smoke from the fire has blanketed major cities in Ontario and Quebec, including Toronto and surrounding areas.
Smoke has reached as far as New York and Connecticut, where the air has been classified as unhealthy.
Most of the smoke comes from Quebec, where 160 fires have been identified.
Environment Canada issued its strongest warning Tuesday for Ottawa, deeming air quality in the Canadian capital a "very high risk" to human health.
Air quality advisories cover most of New York City and Connecticut. They also extend as far north as Boston and as far south as Pittsburgh and Washington DC.
In New York, pictures taken on Tuesday morning showed an orange haze blanketing the city's skyline as wildfire smoke from Canada traveled south.
Public health officials have warned people to minimize exposure to smoke as much as possible, as the air poses immediate and long-term health risks.
