heat

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.

An Indian commuter pours water over his head to cool off as young children watch from a window at a railway station in Allahabad, India, Monday, May 20, 2013. Most of north India has been reeling under heat wave conditions with temperature soaring to over 46 degree Celsius (115 degrees Fahrenheit). (AP Photo/Rajesh Kumar Singh)

Rajesh Kumar Singh/AP

An Indian commuter pours water over his head to cool off as young children watch from a window at a railway station in Allahabad, India on Monday. Most of north India has been reeling under heat wave conditions with temperature soaring to over 46 degree Celsius (115 degrees Fahrenheit) Read more

A man walks on sulphur and mineral salt formations near Dallol in the Danakil Depression...A man walks on sulphur and mineral salt formations near Dallol in the Danakil Depression, northern Ethiopia April 22, 2013. The Danakil Depression in Ethiopia is one of the hottest and harshest environments on earth, with an average annual temperature of 94 degrees Fahrenheit (34.4 Celsius). For centuries, merchants have travelled there with caravans of camels to collect salt from the surface of the vast desert basin. The mineral is extracted and shaped into slabs, then loaded onto the animals before being transported back across the desert so that it can be sold around the country. Picture taken April 22, 2013. REUTERS/Siegfried Modola (ETHIOPIA - Tags: BUSINESS SOCIETY TPX IMAGES OF THE DAY)     ATTENTION EDITORS: PICTURE 2 OF 30 FOR PACKAGE 'ETHIOPIA'S ANCIENT SALT TRAIL'  SEARCH 'DANAKIL DEPRESSION' FOR ALL

Reuters

The Danakil Depression in Ethiopia is one of the hottest and harshest environments on earth, with an average annual temperature of 94 degrees Fahrenheit (34.4 Celsius). For centuries, merchants have traveled there with caravans of camels to collect salt from the surface of the vast desert basin. The mineral is extracted and shaped into slabs, then loaded onto the animals before being transported back across the desert so that it can be sold around the country. Read more

Women collect water from a rain-water pond on the outskirts of Sanaa, Yemen

Hani Mohammed/AP

Women collect water from a pond on the outskirts of Sanaa in Yemen