July 16, 2013
From Hot Summer Days, one of 28 photos. On a hot summer day, a girl stands surrounded by the jets of a fountain on the South Bank in central London, on July 15, 2013. (Reuters/Andrew Winning)

From Hot Summer Days, one of 28 photos. On a hot summer day, a girl stands surrounded by the jets of a fountain on the South Bank in central London, on July 15, 2013. (Reuters/Andrew Winning)

June 24, 2013
From The Solstice and the Supermoon, one of 24 photos. The largest full moon of 2013, a “supermoon” scientifically known as a “perigee moon”, rises over the Tien Shan mountains and the monument to 18th century military commander Nauryzbai Batyr near the town of Kaskelen, some 23 km (14 mi) west of Almaty, Kazakhstan, on June 23, 2013. (Reuters/Shamil Zhumatov)

From The Solstice and the Supermoon, one of 24 photos. The largest full moon of 2013, a “supermoon” scientifically known as a “perigee moon”, rises over the Tien Shan mountains and the monument to 18th century military commander Nauryzbai Batyr near the town of Kaskelen, some 23 km (14 mi) west of Almaty, Kazakhstan, on June 23, 2013. (Reuters/Shamil Zhumatov)

January 11, 2013
From Summer Down Under, one of 31 photos. A white shelf cloud caps brownish dirt from a dust storm, or haboob, as it travels across the Indian Ocean near Onslow on the Western Australia coast in this handout image distributed by fishwrecked.com and taken January 9, 2013. (Reuters/Brett Martin/fishwrecked.com)

From Summer Down Under, one of 31 photos. A white shelf cloud caps brownish dirt from a dust storm, or haboob, as it travels across the Indian Ocean near Onslow on the Western Australia coast in this handout image distributed by fishwrecked.com and taken January 9, 2013. (Reuters/Brett Martin/fishwrecked.com)

June 21, 2012
From Welcoming Summer, one of 31 photos. A Bengal tiger, sprayed with water by a zookeeper on a hot summer day at the Birsa Munda Zoological Park in Ranchi, India, on May 30, 2012. Zoo authorities are helping the animals cope with temperatures in excess of 40 degrees Celsius (104F) by providing coolers, special roofs and regular hose-downs. (STR/AFP/Getty Images)

From Welcoming Summer, one of 31 photos. A Bengal tiger, sprayed with water by a zookeeper on a hot summer day at the Birsa Munda Zoological Park in Ranchi, India, on May 30, 2012. Zoo authorities are helping the animals cope with temperatures in excess of 40 degrees Celsius (104F) by providing coolers, special roofs and regular hose-downs. (STR/AFP/Getty Images)