Image used for illustrative purpose. A man pours water on his face to cool off from hot weather in Skopje, Macedonia July 24, 2017. REUTERS/Ognen Teofilovski

A high-rise residential tower is pictured behind old residential buildings in Mumbai, India July 24, 2017. REUTERS/Danish Siddiqui

U.S musician Macy Gray performs at the Jazzaldia Festival in San Sebastian, Spain, July 24, 2017. REUTERS/Vincent West

People attend a protest against judicial reforms in Wroclaw, Poland, July 24, 2017.

People dressed as Santa Claus take a canal tour of Copenhagen as they take part in the World Santa Claus Congress, an annual event held every summer at the amusement park Dyrehavsbakken, in Copenhagen, Denmark. Scanpix Denmark/Nikolai Linares/via REUTERS

Singer Bono of Irish band U2 and co-founder of ONE organization and Brigitte Macron, wife of the French President, speak at the Elysee Palace in Paris, France, July 24, 2017. REUTERS/Philippe Wojazer

A Canadair firefighting aircraft drops water on a wildfire which burns a forest in Carros, near Nice, France, July 24, 2017. REUTERS/Eric Gaillard

A rainbow shines over the U.S. Capitol in Washington, U.S. July 24, 2017. REUTERS/Joshua Roberts

Supporters of Charlie Gard's parents react outside the High Court during a hearing on the baby's future, in London, Britain July 24, 2017. REUTERS/Peter Nicholls

U.S. President Donald Trump speaks to departing White House interns as he poses for a photograph with them in the East Room of the White House in Washington, U.S., July 24, 2017. REUTERS/Joshua Roberts

Israeli security forces remove metal detectors which were recently installed at an entrance to the compound known to Muslims as Noble Sanctuary and to Jews as Temple Mount in Jerusalem's Old City July 25, 2017. REUTERS/Ammar Awad

A woman puts her malnourished son on a weighing scale at a malnutrition treatment center in Sanaa, Yemen July 24, 2017. REUTERS/Khaled Abdullah

An Afghan man looks outside through a broken window at the site of a suicide attack in Kabul, Afghanistan, July 24, 2017. REUTERS/Omar Sobhani

Cast member Rihanna poses at the European premiere of "Valerian and the City of a Thousand Planets" in London, Britain July 24, 2017. REUTERS/Darren Staples