A tourist walks under the sun in front of the Colosseum in Rome on June 25, 2019 during a heatwave. Meteorologists blamed a blast of torrid air from the Sahara for the unusually early summer heatwave, which could send thermometers up to 40 degrees Celsius (104 Fahrenheit) across large swathes of the continent. (Photo by Alberto Pizzoli/AFP Photo)
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