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People cool off at the Splash Island of Toronto Zoo in Canada, on June 30, 2018. Toronto issued a heat warning on Saturday as the temperature hit 35 degrees Celsius. (Xinhua/Zou Zheng)
People cool off at the Splash Island of Toronto Zoo in Canada, on June 30, 2018. Toronto issued a heat warning on Saturday as the temperature hit 35 degrees Celsius. (Xinhua/Zou Zheng)