heat

A man puts up a fan to block off the strong sun in the afternoon heat at the Bund, one of the most popular tourist spots in the city, in Shanghai, China, Wednesday, Aug. 7, 2013. Hot weather has set in with temperatures rising up to 40 degrees Celsius (104 degrees Fahrenheit) in Shanghai. (AP Photo/Eugene Hoshiko)

Eugene Hoshiko/AP

A man puts up a fan to block off the strong sun in the afternoon heat at the Bund, one of the most popular tourist spots in the city, in Shanghai, ChinaRead more

A man rides on a water chute at an Aqua arena in Mogyorod, near Budapest, as temperatures reach 38 degrees Celsius (100 degrees Fahrenheit) in Hungary, August 6, 2013.

Laszlo Balogh/Reuters

A man rides down a water chute at a water park in Mogyoród, near Budapest, as temperatures reach 38C in Hungary.

A boy cools off in a fountain at a park in Shanghai, China, Thursday, Aug. 1, 2013.  Hot weather has set in with temperatures rising up to 40 degrees Celsius (104 degrees Fahrenheit) in Shanghai.

Eugene Hoshiko/AP

A boy cools off in a fountain at a park in Shanghai, China on Thursday. Hot weather has set in with temperatures rising up to 40 degrees Celsius (104 degrees Fahrenheit) in Shanghai.

Bangladeshi children cool off at Mohammadpur Geneva camp in Dhaka, Bangladesh, Tuesday, July 30, 2013. Mohammadpur Geneva Camp is one of the largest refugee camps in Dhaka City.

A.M. Ahad/AP

Bangladeshi children cool off at Mohammadpur Geneva camp in Dhaka, Bangladesh on Tuesday. Mohammadpur Geneva Camp is one of the largest refugee camps in Dhaka City.

Afghan men cool off with water in a stre...Afghan men cool off with water in a street in Herat on July 29, 2013.   Western Afghanistan is flat and open with the climate accordingly hot and dry around Herat and temperatures are reaching the early forties.  AFP PHOTO/Aref KARIMIAref Karimi/AFP/Getty Images

Aref Karimi/AFP

Men cool off with water in a street in Herat, western Afghanistan, on Monday, where temperatures hit the 40s Read more

A guide shields her face from the sun while touring the park surrounding Kumsusan Palce of the Sun, the mausoleum where bodies of the late leaders Kim Il Sung and Kim Jong Il lie embalmed on Thursday, July 25, 2013 in Pyongyang, North Korea. (AP Photo/Wong Maye-E)

Wong Maye-E/AP

A guide shields her face from the sun while touring the park surrounding the Kumsusan Palace of the Sun in Pyongyang, North Korea.

People sit in the sun in Sheldon Square in west London...People sit in the sun in Sheldon Square in west London July 19, 2013. Britain's first prolonged heatwave in seven years has taken the country by surprise, with rails buckling, shops selling out of electric fans, and scientists estimating the surge in temperature could have caused hundreds of premature deaths.   REUTERS/Paul Hackett   (BRITAIN - Tags: ENVIRONMENT)

Paul Hackett/Reuters

People sit in the sun in Sheldon Square in west London on Friday. Britain’s first prolonged heatwave in seven years has taken the country by surprise, with rails buckling, shops selling out of electric fans, and scientists estimating the surge in temperature could have caused hundreds of premature deaths. Read more

Graduates celebrate after leaving their graduation ceremony at the Royal Festival Hall by entering the fountain 'Appearing Rooms', by Danish artist Jeppe Hein, on the Southbank in high temperatures on July 18, 2013 in London, England. The United Kingdom is experiencing a second week of heatwave conditions.

Oli Scarff/Getty Images

University students celebrate and take a refreshing splash to cool down from the high temperatures after their graduation ceremony at the Royal Festival Hall by entering the fountain ‘Appearing Rooms’, by Danish artist Jeppe Hein, on the Southbank, on Thursday in London, England. The UK is experiencing a second week of heatwave conditions

Competitors run in the Badwater Ultramarathon in Death Valley National Park

Lucy Nicholson/Reuters

Competitors take part in the Badwater Ultramarathon in Death Valley National Park, California, in temperatures that can reach 55 degrees centigrade

A man takes a rest in a park from the heat in Shanghai on July 2, 2013. The Shanghai Meteorological Bureau forecast a heat wave as temperatures reached 38 degrees celcius in the city according to state run media.

Peter Parks/AFP

A man takes a rest in a park from the heat in Shanghai on Tuesday. The Shanghai Meteorological Bureau forecast a heat wave as temperatures reached 38 degrees Celsius in the city according to state run media.