A sun halo appears in the sky above Singapore's Gardens by the Bay on Oct. 25, 2020. (Photo by Then Chih Wey/Xinhua)

A sun halo appears in the sky above Singapore's Gardens by the Bay on Oct. 25, 2020. (Photo by Then Chih Wey/Xinhua)

A sun halo appears in the sky above Singapore's Gardens by the Bay on Oct. 25, 2020. (Photo by Then Chih Wey/Xinhua)

A sun halo appears in the sky above Singapore's Gardens by the Bay on Oct. 25, 2020. (Photo by Then Chih Wey/Xinhua)