NEW YORK, UNITED STATES - JUNE 7: 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A senior man with a wheelchair wears a face mask 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A woman wears a face mask 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A woman sits on a bench 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: People sit on a bench 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: People are seen at a street 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: People are seen at a street 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: People are seen at a street 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. ( Selçuk Acar - Anadolu Agency )

NEW YORK, UNITED STATES - JUNE 7: A view of the hazy city 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. ( Selçuk Acar - Anadolu Agency )