It's not an Instagram filter. The skies really are that yellow.
Smoke from more than 800 active wildfires burning across Canada drifted hundreds of miles across North America this week, blanketing cities in a thick haze.
Across the Northeast and Midwest, including New York City, Minneapolis, and Chicago, as well as Canadian cities such as Toronto, smoke obscured skylines and prompted air quality alerts ranging from "unhealthy" to "hazardous" on Thursday.
Take a look at how the wildfire smoke is turning skies orange across the region.
A satellite image captured on Tuesday showed smoke from Canadian wildfires blowing southeast.
An image taken by the NOAA-21 satellite.NASA Earth Observatory/Lauren Dauphin
As winds carried the smoke further on Wednesday, downtown Toronto was engulfed in yellow haze.
Downtown Toronto.Cole Burston/AFP via Getty Images
Toronto's skyline, including the CN Tower, was obscured by the smoke.
Wildfire smoke filled the sky in Toronto on Wednesday.Zou Zheng/Xinhua via Getty Images
The Canadian government issued an orange air-quality warning for Toronto, advising residents to limit time outdoors and reschedule or cancel outdoor activities.
A Toronto man wore a face mask on Wednesday to minimize exposure to wildfire smoke.Creative Touch Imaging Ltd./NurPhoto via Getty Images
Smoke also began to move into New York City on Wednesday.
The East River near the Brooklyn Bridge in New York City.Alyssa Goodman/AP Photo
On Thursday, New York City issued an air-quality health advisory due to an AQI forecast of 200, the upper end of the "unhealthy" category.
Smoke from wildfires in Canada shrouded the Manhattan skyline on Thursday.Michael Nagle/Bloomberg via Getty Images
The Statue of Liberty was barely visible through the polluted air.
Smoke from wildfires in Canada obscured the Statue of Liberty in New York City.Michael Nagle/Bloomberg via Getty Images
The Minnesota Pollution Control Agency categorized the air in the Twin Cities as "hazardous" on Wednesday.
The sun set behind a layer of smoke in Minneapolis on Wednesday.Stephen Maturen/Getty Images
Dense smoke affected visibility on the Stone Arch Bridge in Minneapolis.
The Stone Arch Bridge in Minneapolis.Stephen Maturen/Getty Images
Chicago's air quality index was rated "very unhealthy" on Thursday, with nearby suburbs experiencing "hazardous" conditions.
Smoke from Canadian wildfires in Chicago.Scott Olson/Getty Images
Aerial photos showed smoke lingering over Chicago neighborhoods.
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