A boy stands while looking outside a window of a building, built in the British Raj era, due to the heat during a power outage in Karachi, Pakistan, June 24, 2015. A heat wave has killed nearly 800 people in Pakistan's financial hub of Karachi and piled pressure on a beleaguered provincial government, as rivals blame it for severe blackouts and crumbling public services that have added to the woe. REUTERS/Akhtar Soomro

A woman sprinkles water on her feet to cool off in the heat in Karachi, Pakistan, June 24, 2015. Pakistan's financial capital of Karachi is wilting in the four-day heat wave that has killed more than 780 people, a health charity said on Wednesday, as the government declared a holiday in the city to encourage people to stay home and cool off. REUTERS/Akhtar Soomro

A child grabs her mother's scarf as they are both covered with a water-soaked towel, to beat the heat, in Karachi, Pakistan, June 24, 2015. Pakistan's financial capital of Karachi is wilting in a four-day heat wave that has killed more than 780 people, a health charity said on Wednesday, as the government declared a holiday in the city to encourage people to stay home and cool off. REUTERS/Akhtar Soomro

A woman (R) wets her burqa to cool her father's head outside the Jinnah Postgraduate Medical Centre (JPMC) in Karachi, Pakistan, June 24, 2015. Pakistan's financial capital of Karachi is wilting in a four-day heat wave that has killed more than 780 people, a health charity said on Wednesday, as the government declared a holiday in the city to encourage people to stay home and cool off. REUTERS/Akhtar Soomro

A man, who collapsed due to the heat, lies on a stretcher with his belongings of sandals and water bottles, outside Jinnah Postgraduate Medical Centre (JPMC) in Karachi, Pakistan, June 24, 2015. Pakistan's financial capital of Karachi is wilting in the four-day heat wave that has killed more than 780 people, a health charity said on Wednesday, as the government declared a holiday in the city to encourage people to stay home and cool off. REUTERS/Akhtar Soomro

A policeman (L) sprinkles water on a colleague, who collapsed due to the heat, in a police van outside Jinnah Postgraduate Medical Centre (JPMC) in Karachi, Pakistan, June 24, 2015. Pakistan's financial capital of Karachi is wilting in the four-day heat wave that has killed more than 780 people, a health charity said on Wednesday, as the government declared a holiday in the city to encourage people to stay home and cool off. REUTERS/Akhtar Soomro

Men cool off at a stream during a hot day in Islamabad, Pakistan, June 23, 2015. A devastating heat wave has killed more than 400 people in Pakistan's southern city of Karachi over the past three days, health officials said on Tuesday, as paramilitaries set up emergency medical camps in the streets. REUTERS/Faisal Mahmood

A man cools off from a public tap after filling bottles during intense hot weather in Karachi, Pakistan, June 23, 2015. A devastating heat wave has killed more than 400 people in Pakistan's southern city of Karachi over the past three days, health officials said on Tuesday, as paramilitaries set up emergency medical camps in the streets. REUTERS/Akhtar Soomro




TPX IMAGES OF THE DAY

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH

A relative (R) waits while volunteers search for a body of a deceased among people who died due to an intense heat wave, at Edhi Foundation morgue in Karachi, Pakistan, June 22, 2015. An intense heat wave killed more than 120 people over the weekend in Pakistan's southern city of Karachi, officials said on Monday, as the electricity grid crashed during the first days of the Muslim holy month of Ramadan. REUTERS/Akhtar Soomro TPX IMAGES OF THE DAY

A volunteer prepares a coffin of a deceased who died due to an intense heat wave, before handing over to relatives, at Edhi Foundation morgue in Karachi, Pakistan, June 22, 2015. An intense heat wave killed more than 120 people over the weekend in Pakistan's southern city of Karachi, officials said on Monday, as the electricity grid crashed during the first days of the Muslim holy month of Ramadan. REUTERS/Akhtar Soomro

A woman uses a piece of cardboard to fan her son, while waiting for their turn for a medical checkup, outside Jinnah Postgraduate Medical Centre (JPMC) during intense hot weather in Karachi, Pakistan, June 23, 2015. An intense heat wave over three days has killed more than 180 people in Pakistan's southern Sindh province, officials said on Monday, leading authorities to declare an emergency as the electricity grid crashed and bodies stacked up in the morgues. REUTERS/Akhtar Soomro

A man (R) cools off under a public tap, while others wait to fill their bottles, during intense hot weather in Karachi, Pakistan, June 23, 2015. A devastating heat wave has killed more than 400 people in Pakistan's southern city of Karachi over the past three days, health officials said on Tuesday, as paramilitaries set up emergency medical camps in the streets. REUTERS/Akhtar Soomro

People receive drinking water from a volunteer at a stall, set up outside Jinnah Postgraduate Medical Centre (JPMC) during intense hot weather in Karachi, Pakistan, June 23, 2015. A devastating heat wave has killed more than 400 people in Pakistan's southern city of Karachi over the past three days, health officials said on Tuesday, as paramilitaries set up emergency medical camps in the streets. REUTERS/Akhtar Soomro

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH

Relatives sit beside a body of a deceased who died due to an intense heat wave, while waiting for an ambulance, at Edhi Foundation morgue in Karachi, Pakistan, June 22, 2015. An intense heat wave killed more than 120 people over the weekend in Pakistan's southern city of Karachi, officials said on Monday, as the electricity grid crashed during the first days of the Muslim holy month of Ramadan. REUTERS/Akhtar Soomro

A woman wets her face to cool off, while sitting outside Jinnah Postgraduate Medical Centre (JPMC) during intense hot weather in Karachi, Pakistan, June 23, 2015. A devastating heat wave has killed more than 400 people in Pakistan's southern city of Karachi over the past three days, health officials said on Tuesday, as paramilitaries set up emergency medical camps in the streets. REUTERS/Akhtar Soomro

Men sleep in shade under a bridge during intense hot weather in Karachi, Pakistan, June 22, 2015. An intense heat wave over three days has killed more than 180 people in Pakistan's southern Sindh province, officials said on Monday, leading authorities to declare an emergency as the electricity grid crashed and bodies stacked up in the morgues. REUTERS/Akhtar Soomro

A man uses a hand-held fan to cool down his son, while waiting for their turn for a medical checkup, outside Jinnah Postgraduate Medical Centre (JPMC) during intense hot weather in Karachi, Pakistan, June 23, 2015. An intense heat wave over three days has killed more than 180 people in Pakistan's southern Sindh province, officials said on Monday, leading authorities to declare an emergency as the electricity grid crashed and bodies stacked up in the morgues. REUTERS/Akhtar Soomro

A volunteer sits beside a window, while waiting for the relatives of a deceased who died due to intense hot weather to collect the body, at Edhi Foundation morgue in Karachi, Pakistan, June 21, 2015. Pakistan Meteorological Department (PMD) has forecast hot weather in Karachi for the next 24 hours as the highest temperature recorded in the city on Sunday remained at 44.8 degrees Celsius (about 112.6 F), according to local media. REUTERS/Akhtar Soomro

A man takes bath to cool off in a river during a hot day in Peshawar, Pakistan, June 23, 2015. A devastating heat wave has killed more than 400 people in Pakistan's southern city of Karachi over the past three days, health officials said on Tuesday, as paramilitaries set up emergency medical camps in the streets. REUTERS/Fayaz Aziz 

A family visits Clifton beach during intense hot weather in Karachi, Pakistan, June 22, 2015. An intense heat wave over three days has killed more than 180 people in Pakistan's southern Sindh province, officials said on Monday, leading authorities to declare an emergency as the electricity grid crashed and bodies stacked up in the morgues. REUTERS/Athar Hussain