Clouds

Skyscrapers Shanghai World Financial Center and Jin Mao Tower are seen during heavy rain at the financial district of Pudong in Shanghai on Friday

Aly Song/Reuters

Skyscrapers Shanghai World Financial Center and Jin Mao Tower are seen during heavy rain at the financial district of Pudong in Shanghai on Friday

A man walks his sheep in a water-logged paddy field after recent rains in Srinagar on Thursday

Danish Ismail/Reuters

A man walks his sheep in a water-logged paddy field after recent rains in Srinagar on Thursday

A volcanic eruption illuminates the clouds around the Etna volcano, near Catania, Sicily island, southern Italy, early 02 February 2015. The eruptions are reported to have begun on 31 January 2015 at Mount Etna's new south east crater

Davide Cautullo/EPA

A volcanic eruption illuminates the clouds around the Etna volcano, near Catania, Sicily island, southern Italy, early on Monday

A view of the city's skyline from the Beijing Yintai Centre building at sunset in Beijing...A view of the city's skyline from the Beijing Yintai Centre building at sunset in Beijing, August 29, 2013. REUTERS/Jason Lee (CHINA - Tags: ENVIRONMENT CITYSCAPE)

Jason Lee/Reuters

A view of the Beijing skyline from the Yintai Centre in the Chinese capital 

Lightning strikes over the wate...TOPSHOTS Lightning strikes over the waters of the Lamma Channel during a thunderstorm in Hong Kong on June 4, 2013. The Hong Kong Observatory reported some 181 "cloud-to-ground" lightning strikes over the territory between 8 and 9pm local time.    AFP PHOTO / RICHARD A. BROOKSRICHARD A. BROOKS/AFP/Getty Images

Richard A.Brooks/AFP

Lightning strikes over the water of the Lamma Channel during a thunderstorm in Hong Kong on Tuesday evening. The Hong Kong Observatory reported about 181 “cloud-to-ground” lightning strikes over the territory between 8pm and 9pm local time 

Clouds build up over the Victoria harbour before a storm in Hong Kong on April 30, 2013.

Philippe Lopez/AFP

Clouds build up over the Victoria harbour before a storm breaks in Hong Kong on Tuesday.