A woman looks at a swimmer getting herself warm after the annual Christmas winter swimming competition in the Vltava river in Prague December 26, 2014. (Photo by David W. Cerny/Reuters)
A visitor falls down as they run away from a wave caused by a tidal bore which surged past a barrier on the banks of Qiantang River, in Hangzhou, Zhejiang province, China, October 28, 2015. (Photo by Reuters/China Daily)
Carey Williams leaps into the icy waters of the Snake River for the 2022 Polar Plunge at the Hells Gate Marina on Saturday, January 1, 2022, in Clarkston, Wash. (Photo by August Frank/Lewiston Tribune via AP Photo)
A winter swimmer jumps into a pool in the frozen Songhua River during an activity for welcoming the Chinese New Year on January 30, 2022 in Harbin, Heilongjiang Province of China. (Photo by Liu Yang/VCG via Getty Images)
A cow covered with foam scavenges in the waste left on the banks of the polluted Yamuna river in New Delhi on October 10, 2020. (Photo by Sajjad Hussain/AFP Photo)
A man bathes in an ice hole in the Neva River St. Petersburg, Russia, Wednesday, February 10, 2021. The temperature in St. Petersburg is –15C ( 5 °F). (Photo by Dmitri Lovetsky/AP Photo)