Elephants of Cirkus Arena are being hosed down by local firefighters during a hot summer day in Gilleleje, Denmark on Aug. 2, 2018.
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Boys play in a fountain on a hot summer day in Brussels on July 26, 2018.
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Middle school students use portable fans amid the sweltering heat during a rally demanding full compensation and apology for wartime sex slaves from Japanese government in front of the Japanese embassy in Seoul, South Korea on Aug. 1, 2018. South Korean Meteorological Administration issued a heat wave warning for Seoul and other cities.
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A former Russian serviceman cools down in a fountain while marking the Paratroopers' Day, the annual holiday of Russia's Airborne Troops, in the Gorky Central Park of Culture and Leisure in Moscow on Aug. 2, 2018.
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Two little girls ride their scooters through the shimmering heat on the tarmac of a former military airport in Frankfurt on July 30, 2018.
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People crowd in the Caribbean Bay swimming pool trying to escape the heat in Yongin, South Korea on Aug. 2, 2018.
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David W Cerny/Reuters
People are sprayed with water to cool down as temperature hovered over 98.6 degrees Fahrenheit, in Prague, Czech Republic on July 31, 2018.
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People fill bottles with water at the Barcaccia fountain in Spain Square as temperature soars throughout the country, in Rome on Aug. 1, 2018.
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A dog jumps into the water of the river Rhine in Biebesheim, Germany, on July 31, 2018.
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A couple watches the sun go down on a hot day on top of the Feldberg mountain near Frankfurt on July 30, 2018.
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Women wearing the South Korean traditional 'Hanbok' attire take a selfie under an umbrella to avoid heat at the Gyeongbok Palace, the main royal palace during the Joseon Dynasty, in Seoul, South Korea on Aug. 1, 2018.
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Teens play at a lake in Markkleeberg, eastern Germany on July 31, 2018.
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A white tiger cools off in the water during the hot weather in Biopark zoo in Rome on Aug. 2, 2018.
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A worker protects his head with a little sun umbrella during hot summer weather on a road construction site in Killwangen, Switzerland on July 30, 2018.
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A woman looks out from a balcony as the sun sets at the end of a hot summer day in Madrid on Aug. 1, 2018. Much of Spain is on alert as the country's weather agency warns that temperatures could surpass 104 Fahrenheit due to a hot air mass moving northward from the African continent.