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In Serbia where the meteoalarm has been raised to 'red', extremely hot weather with temperatures up to 39 degrees Celsius is expected to continue over the next several days.

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Cezar, a 32 year-old polar bear eats a watermelon in its enclosure in Belgrade's zoo, Serbia.Marko Djurica/Reuters

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Twiggy, a 42-year-old elephant, is sprayed with water at Belgrade's Zoo during a heatwave.Andrej Isakovic/AFP / Getty Images

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A zookeeper sprays water onto an arctic wolf to help it cool down in its enclosure in Belgrade's zoo, Serbia.Marko Djurica/Reuters

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A zookeeper feeds a hippopotamus with a watermelon in its enclosure in Belgrade's zoo, Serbia.Marko Djurica/Reuters

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Two white lions sleep at Belgrade Zoo during a heatwave.Andrej Isakovic/AFP / Getty Images

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A 35-year-old polar bear eats a piece of watermelon at Belgrade Zoo.Andrej Isakovic/AFP / Getty Images

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A bear reacts in its enclosure at Belgrade Zoo during a heatwave.Andrej Isakovic/AFP / Getty Images

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A seal cools off at Belgrade's Zoo during a heatwave.Andrej Isakovic/AFP / Getty Images

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Twiggy, a 42-year-old elephant, is sprayed with water in Belgrade's zoo, Serbia.Andrej Isakovic/AFP / Getty Images

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Cezar, a 32 year-old polar bear cools off in its enclosure in Belgrade's zoo, Serbia.Marko Djurica/Reuters

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