Manhattan skyline and a red sun is seen in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)

Empire State Building in Manhattan is seen in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)

Manhattan skyline is seen in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)

A boat moves in sunlight reflections on a river as the Manhattan skyline is surrounded in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)

A woman takes photo of Manhattan skyline in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)

Manhattan skyline and a red sun is seen in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)

A man takes photo of Manhattan skyline in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)

Empire State Building in Manhattan is seen in a thick haze in New York, the United State, July 20, 2021. Smoke from the wildfires in the western U.S. has contributed to the haze, according to local weather service. (Photo: Xinhua)