heat

A passenger bathes an child using a pipe that supplies water to trains at a railway station on a hot summer day in the northern Indian city of Allahabad April 23, 2015. Temperatures in Allahabad on Thursday reached to 42 degree Celsius (107.6 degree Fahrenheit), according to India's metrological department website

Jitendra Prakash/Reuters

A passenger bathes a child using a pipe that supplies water to trains at a railway station on a hot summer day in the northern Indian city of Allahabad. Temperatures in Allahabad on Thursday reached to 42 degree Celsius

A Pakistani youth, who was Internally Displaced from Pakistan's tribal areas, sleeps on a bed to escape the heat trapped in his mud home, near a wholesale fruit and vegetable market where he works, on the outskirts of Islamabad, Pakistan, early Monday, Sept. 22, 2014.

Muhammed Muheisen/AP

An youth displaced from Pakistan’s tribal areas sleeps outdoors near the wholesale fruit and vegetable market where he works on the outskirts of Islamabad, Pakistan, to escape the heat in his mud hut

Children play in a fountain to beat the heat in central Seoul on August 1, 2014.  South Korea's state weather agency issued a heat wave warning for Seoul for the first time this year, advising people to stay indoors. Heat wave warnings are issued when the daytime high is expected to stay above 35 C (95F) for two or more consecutive days, according to state media.

Ed Jones/AFP

Children play in a fountain to beat the heat in central Seoul on Friday. South Korea’s state weather agency issued a heat wave warning for Seoul for the first time this year, advising people to stay indoors, as temperatures are expected to exceed 35 celsius

Pakistani day laborer Hassanain Ahmad, 17, cools off under a water supply pipe as the temperature rises in Islamabad, Pakistan, Monday, June 2, 2014. Temperatures reached 39 degrees Celsius (102.2 degrees Fahrenheit)

Muhammed Muheisen/AP

Pakistani day laborer Hassanain Ahmad cools off under a water supply pipe as the temperature rises in Islamabad, Pakistan to 39 degrees on Monday

A man takes a nap on a cushion which is displayed as a promotional event of a fashion brand at a shopping mall in Beijing May 30, 2014. Temperatures in Beijing on Friday reached 37 degrees Celsius (98.6 Fahrenheit) since it hit a record high of around 40 degrees Celsius (104 Fahrenheit) yesterday, the highest since 1951. The Beijing heatwave is expected to continue through the weekend, local media reported.

Kim Kyung-Hoon/Reuters

A man takes a nap on a cushion, displayed as part of a promotional event, at a shopping mall in Beijing. Temperatures in the city on Friday reached 37 degrees centigrade

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, China

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 

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. 

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.

  A young woman from Brazil cools off in a fountain on a scorching hot summer day in the city center on June 20, 2013 in Berlin, Germany. Central Europe is in the grips of a heat wave in which temperatures in some regions have reached up to 38 degrees celsius.

Sean Gallup/Getty Images

A young woman from Brazil cools off in a fountain on a scorching hot summer day in the city centre in Berlin, Germany.

Tourists look at the Singapore Flyer on a hazy day in Singapore June 17, 2013. The haze worsened on Monday with the Pollutant Standards Index (PSI) hitting 111 at 4 pm, according to local media.

Edgar Su/Reuters

Tourists look at the Singapore Flyer on a hazy day in Singapore on Monday. The haze worsened on Monday with the Pollutant Standards Index hitting 111 at 4 pm, according to local media.

People relax in chairs around a fountain as they take in the sun in the Tuileries Garden in central Paris as summer temperatures arrive in France, June 6, 2013.

Charles Platiau/Reuters

People relax in chairs around a fountain as they take in the sun in the Tuileries Garden, central Paris as summer temperatures arrive in France.

An Indian man cools off his horse during...An Indian man cools off his horse during a bath in a canal in Jalandhar on May 23, 2013. High temperatures hovering around 45 degrees Celsius are affecting much of central and northern India ahead of the summer monsoon rains. AFP PHOTO/ SHAMMI MEHRASHAMMI MEHRA/AFP/Getty Images

Shammi Mehrashammi/AFP

An Indian man cools off his horse during a bath in a canal in Jalandhar on Thursday. High temperatures hovering near 45 degrees centigrade are affecting much of central and northern India ahead of the summer monsoon rains.

India Power Protests

Kevin Frayer/AP

Indian workers climb high-tension power cables without safety equipment in New Delhi. A blistering heatwave has caused massive power cuts and water shortages across much of north and western India, with some people taking to the streets to express their anger with the government.