People rest and sleep on couches at a IKEA store to escape the summer heat in Hangzhou, Zhejiang province, China. The local temperature reached as high as 39 degrees Celsius (102 degrees Fahrenheit) on Tuesday, according to local media.

China Daily/Reuters

People rest and sleep on couches at a IKEA store to escape the summer heat in Hangzhou, Zhejiang province, China

A boy skips at a school in Yemen's capital Sanaa sheltering people after the conflict forced them to flee their areas from the Houthi-controled northern province of Saada August 4, 2015. A Saudi-led Arab alliance launched a military campaign on March 26 to end Houthi control over much of Yemen and to return President Abd-Rabbu Mansour Hadi from exile

Khaled Abdullah/Reuters

A boy skips at a school in Yemen’s capital Sanaa sheltering people after the conflict forced them to flee their areas from the Houthi-controled northern province of Saada on Tuesday

Migrants walk along railway tracks on their way to catch a train heading to the Serbian border, at the train station in Gevgelija, The Former Yugoslav Republic of Macedonia, 04 August 2015. Greece and Italy are the main entry points for Europe-bound asylum seekers and economic migrants. After they have reached the bloc, many start to make their way to wealthier countries in Western Europe. From the beginning of the year to mid-June, nearly 160,000 landed in both countries, according to International Organization for Migration (IOM) estimates

Georgi Licovski/EPA

Migrants walk along railway tracks on their way to catch a train heading to the Serbian border, at the train station in Gevgelija, the Former Yugoslav Republic of Macedonia on Tuesday

A general view of the Christ the Redeemer on Tuesday. Wednesday, marks one year to go from the start of the 2016 Olympic games which will be held in Rio de Janeiro, Brazil

Mauro Pimentel/PA

A general view of the Christ the Redeemer on Tuesday. Wednesday, marks one year to go from the start of the 2016 Olympic games which will be held in Rio de Janeiro, Brazil

Afghan farmers carry bundles of wheat during harvest, on the outskirts of Mazar-i-Sharif.

Farshad Usyan/AFP

Afghan farmers carry bundles of wheat during harvest, on the outskirts of Mazar-i-Sharif

A girl swims to escape a heat in front of a large cutout that raises awareness on water shortage, at the Han River Park in Seoul, South Korea, Tuesday, Aug. 4, 2015. A heat wave warning was issued in Seoul as temperatures soared above 32 degrees Celsius (89.6 Farenheit).

Ahn Young-joon/AP

A girl swims to escape a heat in front of a large cutout that raises awareness on water shortage, at the Han River Park in Seoul, South Korea on Tuesday

 A DC-10 firefighting aircraft drops fire retardant on a ridge in front of the Rocky Fire on August 3, 2015 near Clearlake, California. Nearly 3,000 firefighters are battling the Rocky Fire that has burned over 60,000 acres has forced the evacuation of 12,000 residents in Lake County. The fire is currently 12 percent contained and has destroyed at least 14 homes. 6,300 homes are threatened by the fast moving  blaze

Justin Sullivan/Getty Images

A DC-10 firefighting aircraft drops fire retardant on a ridge in front of the Rocky Fire near Clearlake, California. Nearly 3,000 firefighters are battling the Rocky Fire that has burned over 60,000 acres has forced the evacuation of 12,000 residents in Lake County

The parents of Shafqat Hussain, a convicted murderer speak  to journalists after their son was hanged at a central jail in Karachi, at their relatives home in Muzaffarabad, the capital of Pakistani administered Kashmir, 04 August 2015. Pakistani authorities on 04 August hanged Shafqat Hussain whose family claimed was only 14 years old when convicted on murder charges a decade ago, officials said. Shafqat Hussain was executed at a prison in the southern city of Karachi, an Interior Ministry official said. One of Hussain's relatives confirmed the hanging to media as the family waited for the body outside the prison. The had been postponed four times this year to settle a dispute about his age at the time he killed a 7-year-old boy in 2004.

Amiruddin Mughal/EPA

The parents of Shafqat Hussain, a convicted murderer sit at their relatives home in Muzaffarabad, the capital of Pakistani administered Kashmir after their son was hanged at a central jail in Karachi on Tuesday

A girl refreshes under a fountain during hot temperatures on Sechselaeutenplatz square in Zurich on Monday

Arnd Wiegmann/reuters

A girl refreshes under a fountain during hot temperatures on Sechselaeutenplatz square in Zurich on Monday

An Afghan woman waits to get medical treatment at the refugee camp in Herat, Afghanistan on Monday. The camp provides refugees with basic medical treatment, education, food and hygiene

Jalil Rezayee/EPA

An Afghan woman waits to get medical treatment at the refugee camp in Herat, Afghanistan on Monday. The camp provides refugees with basic medical treatment, education, food and hygiene

A man rides a bull during festivities honouring the capital's patron saint Santo Domingo de Guzman in Managua, Nicaragua

Oswaldo Rivas/Reuters

A man rides a bull during festivities honouring the capital’s patron saint Santo Domingo de Guzman in Managua, Nicaragua

Locals use makeshift raft and rubber inner tube as a means of getting through  flooded road in Kale township of Sagaing Region, Myanmar on Monday. Myanmar president  declared four regions (Sagaing, Magway Regions and Rakhine, Chin States) as disaster zones on 31 July 2015. Heavy monsoon rains caused floods around Myanmar with dozens deaths being reported as thousands are fleeing their homes in several regions across the country. In Myanmar monsoon starts at the beginning of June and ends in September.

Lynn Bo Bo/EPA

Locals use makeshift raft and rubber inner tube as a means of getting through flooded road in Kale township of Sagaing Region, Myanmar on Monday. Myanmar president declared four regions (Sagaing, Magway Regions and Rakhine, Chin States) as disaster zones

A spectator watches the morning heats at the Swimming World Championships in Kazan, Russia, Monday, Aug. 3, 2015

Michael Sohn/AP

A spectator watches the morning heats at the Swimming World Championships in Kazan, Russia on Monday

Firefighter Joe Darr douses flames of the Rocky fire along Highway 20 near Clearlake, California. Thousands of firefighters battled raging wildfires on August 2 in drought-parched California, where officials evacuated entire neighborhoods and closed miles of highway in the path of the inferno, which has claimed at least one life.

Josh Edelson/AFP

Firefighter Joe Darr douses flames of the Rocky fire along Highway 20 near Clearlake, California. Thousands of firefighters battled raging wildfires in drought-parched California, where entire neighborhoods have been evacuated

The America's Cup...Sailing - The America's Cup - Portsmouth - 24/7/15  Land Rover BAR skippered by Sir Ben Ainslie (L) sail's against Team France (2nd L), Team Oracle USA (2nd R) and Artemis Racing during practice in Portsmouth

Andrew Yates/Reuters

Land Rover BAR skippered by Sir Ben Ainslie sail’s against Team France, Team Oracle USA and Artemis Racing during practice in Portsmouth in Americas cup practice

Russian navy battle ships station in the bay during a rehearsal of the Russian Navy Day parade in Sevastopol, Crimea, Friday, July 24, 2015. The Russian Navy Day is celebrated the last Sunday of July.

Alexander Polegenko/AP

Russian navy battle ships station in the bay during a rehearsal of the Russian Navy Day parade in Sevastopol, Crimea on Friday

A long-distance swimmer dives into the Atlantic Ocean at dawn, Friday, July 24, 2015, in Falmouth, Maine. The woman is part of a group that regularly starts their day with a 2-mile swim. Many of the swimmers keep a float tethered to their bodies for safety

Robert F. Bukaty/AP

A long-distance swimmer dives into the Atlantic Ocean at dawn on Friday, in Falmouth, Maine. The woman is part of a group that regularly starts their day with a 2-mile swim

A Turkish soldier prays during the burial ceremony of Turkish soldier Mehmet Yavuz Nane on Friday, in Gaziantep

Bulent Kilic/AFP

A Turkish soldier prays during the burial ceremony of Turkish soldier Mehmet Yavuz Nane on Friday, in Gaziantep

Police officers patrol along a street in Kenya's capital Nairobi on July 24, 2015, ahead of the visit of US President Barack Obama. Obama arrives in his ancestral homeland Kenya later today, with a massive security operation under way to protect him from Al-Qaeda-linked Somali militants

Simon Maina/AFP

Police officers patrol along a street in Kenya’s capital Nairobi on Friday, ahead of the visit of US President Barack Obama

Young men clean second-hand shoes to sell them on a market in Bujumbura on July 24, 2015. Burundian President Pierre Nkurunziza is set to win a controversial third term in office, but analysts say his victory will be hollow, with the country divided, isolated and facing aid cuts

Phil Moore/AFP

Young men clean second-hand shoes to sell them on a market in Bujumbura on Friday. Burundian President Pierre Nkurunziza is set to win a controversial third term in office