People gather to attend the posthumous unveiling of rapper Tupac Shakur's star on the Hollywood Walk of Fame in Los Angeles, California, U.S June 7, 2023. (Photo by Mario Anzuoni/Reuters)





A woman wears a face mask as smoke continues to shroud the sun as it rises behind the skyline of Manhattan in New York City on June 7, 2023, as seen from Weehawken, New Jersey. (Photo by Kena Betancur/VIEWpress/Getty Images)





The New York City Skyline is seen through haze Tuesday, June 6, 2023, in New York. (Photo by Frank Franklin II/AP Photo)





A pedestrian walks past the smoke and haze shrouded New York Stock Exchange building in New York City Wednesday, June 7, 2023. (Photo by J. David Ake/AP Photo)





Canada geese are pictured along the Hudson River shortly after sunrise, as haze and smoke caused by wildfires in Canada hang over the Manhattan skyline, in New York City, New York, U.S., June 7, 2023. (Photo by Mike Segar/Reuters)





Light is reflected in the window of an office building in Times Square as Manhattan is shrouded in haze and smoke which drifted south from wildfires in Canada, in New York City, New York, U.S., June 7, 2023. (Photo by Maye-E Wong/Reuters)





The Empire State Building is seen from the top of the Rockefeller Center, as haze and smoke caused by wildfires in Canada hang over the Manhattan skyline, in New York City, New York, U.S., June 7, 2023. (Photo by Andrew Kelly/Reuters)





A person looks out from the top of the Rockefeller Center, as haze and smoke caused by wildfires in Canada hang over the Manhattan skyline, in New York City, New York, U.S., June 7, 2023. (Photo by Andrew Kelly/Reuters)





Traffic moves over the Ed Koch Queensboro Bridge as smoke from Canadian wildfires casts a haze over the area on June 7, 2023 in New York City. Air pollution alerts were issued across the United States due to smoke from wildfires that have been burning in Canada for weeks. (Photo by Eduardo Munoz Alvarez/Getty Images)





Golfers watch their shots at the driving range at Valley Country Club in Sugarloaf, Pa., as smoke from wildfires in Canada fill the air, Wednesday June 7, 2023. (Photo by John Haeger/Standard-Speaker via AP Photo)





Heavy smoke turns the sky yellow as people walk across 42nd Street in Times Square at sunset on June 6, 2023, in New York City. (Photo by Gary Hershorn/Getty Images)





A person sells face masks outside a souvenir store, Wednesday, June. 7, 2023, in New York. (Photo by Yuki Iwamura/AP Photo)





A man wears a face mask as smoke continues to shroud the sun as it rises behind the skyline of Manhattan in New York City on June 7, 2023, as seen from Weehawken, New Jersey. (Photo by Kena Betancur/VIEWpress/Getty Images)





The sun rises over a hazy New York City skyline as seen from Jersey City, N.J., Wednesday, June 7, 2023. Intense Canadian wildfires are blanketing the northeastern U.S. in a dystopian haze, turning the air acrid, the sky yellowish gray and prompting warnings for vulnerable populations to stay inside. (Photo by Seth Wenig/AP Photo)





A passenger wearing a face mask rides the Staten Island Ferry past the Manhattan skyline during heavy smog in New York on June 6, 2023. Smoke from Canada’s wildfires has engulfed the Northeast and Mid-Atlantic regions of the US, raising concerns over the harms of persistent poor air quality. (Photo by Ed Jones/AFP Photo)





Niamh Farley from Ireland looks out at Midtown Manhattan in the haze from the Top of the Rock NYC Observation Deck at Rockefeller Center on June 7, 2023. Smoke from Canada’s wildfires has engulfed the Northeast and Mid-Atlantic regions of the US, raising concerns over the harms of persistent poor air quality. (Photo by Timothy A. Clary/AFP Photo)





People wear face masks to protect themselves during bad air quality as smoke of Canadian wildfires brought in by wind in New York, United States on June 7, 2023. New York City has the worst air in the world according to IQAir, a Swiss air monitoring company as Canadian wildfire smoke continues to filter into the city. Authorities urge people to wear masks, all outdoor activities for school children were canceled as well as regular baseball game at Yankee stadium between Yankees and White Sox. Many activities in city parks were canceled as well. (Photo by Selcuk Acar/Anadolu Agency via Getty Images)





People walk in Central Park as smoke from wildfires in Canada cause hazy conditions in New York City on June 7, 2023. Smoke from Canada's wildfires has engulfed the Northeast and Mid-Atlantic regions of the US, raising concerns over the harms of persistent poor air quality. (Photo by Timothy A. Clary/AFP Photo)





A person looks out at Midtown Manhattan in the haze from the Top of the Rock NYC Observation Deck at Rockefeller Center on June 7, 2023. Smoke from Canada’s wildfires has engulfed the Northeast and Mid-Atlantic regions of the US, raising concerns over the harms of persistent poor air quality. (Photo by Timothy A. Clary/AFP Photo)





A child stands on the shore before the New York city skyline and east river shrouded in smoke, in Brooklyn on June 5, 2023. Smoke from the hundreds of wildfires blazing in eastern Canada has drifted south. Hundreds of wildfires were burning in Canada on June 6, 2023, according to the Canadian Interagency Forest Fire Centre, as fires have broken out across the country in recent weeks. Quebec alone had more than 150 active blazes across the province, the fire agency said. (Photo by Ed Jones/AFP Photo)