Cole Burston / AFP / GettyPeople walk in downtown Toronto as smoke from forest fires in northern Ontario causes poor air quality over the city, in Toronto, Ontario, Canada, on July 15, 2026.Stephen Maturen / GettyThe sun sets behind a layer of smoke on July 15, 2026, in Minneapolis, Minnesota.Gary Hershorn / GettyThe sun rises behind the skyline of Midtown Manhattan and the Empire State Building in New York City as smoke from Canadian wildfires moves into the region, on July 15, 2026, as seen from Jersey City, New Jersey.Terence Lewis / Icon Sportswire / GettyWildfire smoke fills the air as fans in Citizens Bank Park watch a game between the Philadelphia Phillies and the New York Mets on July 16, 2026 in Philadelphia.Ryan Garza / USA Today / ReutersPeople wear masks to protect themselves from wildfire smoke while attending the Ann Arbor Art Fair in downtown Ann Arbor, Michigan, on July 16, 2026.Finn Gomez / GettySmoke from massive wildfires in Canada and Minnesota engulf the Washington, D.C., skyline, reducing visibility and casting a colored haze over the U.S. Marine Corps War Memorial as the sun rises on July 17, 2026.Anthony Soufflé / Minnesota Star Tribune / GettyU.S. Forest Service employees help evacuate canoeists from the Boundary Waters Canoe Area Wilderness after multiple wildfires burning there prompted its closure and evacuation on July 14, 2026, near Ely, Minnesota,Anthony Soufflé / Minnesota Star Tribune / GettyThick smoke from the Camp Fire hangs in the air above Moose Lake in Minnesota.John Tlumacki / The Boston Globe / GettyPeople look at the yellow sky from the Quincy Ferry dock in Quincy, Massachusetts, on July 15, 2026.Carlos Osorio / ReutersA person points to the skyline while they ride the ferry from Toronto Island, as wildfire smoke from northwestern Ontario fills the sky, combined with an intense heat wave, prompting health warnings and calls for residents to limit outdoor activity in Toronto, Ontario, Canada, on July 15, 2026.Arrush Chopra / NurPhoto / ReutersThe sun rises over Toronto’s waterfront, seen through dense wildfire smoke on July 16, 2026.John Tlumacki / The Boston Globe / GettyA yellowish sky from Canadian wildfires forms the backdrop for a Ferris wheel that spins at Pier 5 in the Boston Seaport on July 14, 2026.Scott Olson / GettyIn Chicago, Illinois, Emma Kristin jumps into Lake Michigan while smoke from Canadian wildfires covers the lakefront on July 16, 2026. City officials encouraged people to stay inside because the air-quality index in the city was rated “very unhealthy,” with some nearby suburban areas rated “hazardous.”Stephen Maturen / GettyPeople walk on the Stone Arch Bridge as dense smoke effects visibility on July 15, 2026, in Minneapolis, Minnesota.Eric Seals / USA Today Network / Reuters ConnectThe Lake Orion Boat Club, on an island on Lake Orion, Michigan, is seen through wildfire smoke from Canada on July 16, 2026.Steven Garcia / NurPhoto / ReutersPeople play basketball as the Minneapolis skyline is obscured by wildfire smoke in the background, seen on July 15, 2026.Yuki Iwamura / APThe Statue of Liberty stands at sunset as smoke from wildfires blankets the sky on July 16, 2026, in New York City.John Taggart / ZUMA Press Wire / ReutersWildfire smoke obscures the skyline in Manhattan, New York, on July 16, 2026.David Dee Delgado / ReutersCanadian wildfire smoke blankets the Bronx borough of New York City on July 16, 2026.Gary Hershorn / GettyWildfire smoke shrouds the sun as it rises behind the skyline of Midtown Manhattan and the Empire State Building in New York City, as well as geese in a park, on July 17, 2026, in Hoboken, New Jersey.