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In New York, the worst heat wave of the summer has descended on the city this week, with temperatures approaching the 100s. In this photo taken on July 17, the sand is hot, so run, don't walk, when it comes to enjoying Rockaway Beach in bare feet.
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Speaking of bare, the "Naked Cowboy" performs in the midday heat in Times Square on July 16, 2013, in New York City.
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Chess players use umbrellas to find shade in Union Square on July 16, 2013, in New York City. The stifling heat wave is expected to continue through the week.
New York isn't the only city baking under the Northern Hemisphere summer. In this photo, a heat wave blazes away in Shanghai on July 17, 2013.
A young boy cools down in a stream to get relief from hot weather in Hangzhou, east China's Zhejiang province, on July 14, 2013. Fuzhou, Chongqing, Hangzhou and Haikou have been named the hottest four cities in China by Weather China.
Internet users have complained, however, that the bureau's report is not accurate since Nanjing, famously one of China's hottest cities and a regular in the top four, was only ranked No. 14. The weather website's official microblog said that over the past three decades (1981-2010), the temperature in southern China has increased significantly. The number of hot days in Guangzhou in a year increased by seven while Fuzhou and Haikou saw increases of five days on average.
Chongqing, Wuhan, Nanchang and Nanjing were previously considered the hottest cities in the country and known as China's four ovens. Here, locals dabble in a river to get relief from hot weather in Chongqing on July 13, 2013.
With temperatures in the 90s and a heat index above 100, Michigan residents try to keep cool by tubbing down Argo Cascades along the Huron River in Ann Arbor on July 16.
A man swims the butterfly stroke in the Moskva (Moscow) river at the Silver Pine Forest (Serebryany Bor) recreation area on July 15, 2013.
An Amur tiger fishes a frozen treat out of the water in its enclosure at the zoo in Leipzig, Germany, on July 17, 2013. The keepers have given the tigers frozen treats to stay cool in the warm summer temperatures. The tiger brothers Ivo and Tamur will celebrate their first birthday on 20 July.
A red-bellied Lemur licks a vegetable ice lolly, specially prepared by the zoo keepers at Anna's Welsh Zoo, St. Florence, in Tenby, West Wales, U.K., on July 13, 2013.
Ruby-Grace Farruggia, age two, eats an ice cream with her father, Lee, on Castle Hill beach, in Tenby, West Wales, U.K., on July 13, 2013.
People play volleyball on Moscow's Strogino beach on July 15, 2013.
Holidaymakers take advantage of the sun and warm temperatures near the Baltic Sea on Ruegen Island in Binz, Germany, on July 16, 2013.
A Palestinian boy washes his horse in the sea at Gaza beach during the hot weather on July 12, 2013.
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Iain Hughes (L) of Cincinnati, Ohio passes through heat waves on highway 136 north of Lake Owens as he approaches the town of Lone Pine during the AdventurCORPS Badwater 135 ultra-marathon race on July 16, 2013 outside of Death Valley National Park, Calif.
Billed as the toughest footrace in the world, the 36th-annual Badwater 135 starts at Badwater Basin in Death Valley, 280 feet below sea level, where athletes begin a 135-mile non-stop run over three mountain ranges in extreme mid-summer desert heat to finish at 8,350-foot near Mount Whitney for a total cumulative vertical ascent of 13,000 feet.
July 10 marked the 100-year anniversary of the all-time hottest world record temperature of 134 degrees, set in Death Valley where the average high in July is 116. A total of 96 competitors from 22 nations are attempting the run which equals about five back-to-back marathons. Previous winners have completed all 135 miles in slightly less than 24 hours.
An Afghan boy puts an ice brick on his bicycle at an ice factory in Ghazni province in eastern Afghanistan on July 17, 2013.
A Free Syrian Army fighter (center) cools himself with water to beat the heat in Deir al-Zor on July 11, 2013.
A boy jumps into a canal to cool himself in Nangarhar province in eastern Afghanistan on July 14, 2013.