France, UK issue heat warnings as temperatures soar to unusual levels in western Europe

Children play soccer as they cool down in a fountain beside Manzanares river in Madrid, Spain, Monday, June 29, 2015. Weather stations across Spain are warning people to take extra precautions as a heat wave engulfs much of the country, increasing the risk of wildfires. The country's meteorological agency says a mass of hot air originating in Africa is moving northwards, bringing with it until at least Monday temperatures reaching 40 Celsius (104 Fahrenheit). (AP Photo/Andres Kudacki) (The Associated Press)

People cool off at a weir in the evening, after a day with temperatures of more than 37 degrees (98 Fahrenheit), at the Arga River which crosses the edge of Pamplona, northern Spain, Monday, June 29, 2015. Weather stations across Spain are warning people to take extra precautions as a heat wave engulfs much of the country, increasing the risk of wildfires. The country's meteorological agency says a mass of hot air originating in Africa is moving northwards, bringing with it until at least Monday temperatures reaching 40 C. (AP Photo/Alvaro Barrientos) (The Associated Press)

Spectators shelter from the sun and watch the singles first round match between Angelique Kerber of Germany and Carina Witthoeft of Germany at the All England Lawn Tennis Championships in Wimbledon, London, Tuesday June 30, 2015. (AP Photo/Kirsty Wigglesworth) (The Associated Press)