A flood-affected man waves to a coastguard chopper in Chennai, India, Saturday, December 5, 2015. Although floodwaters have begun to recede, vast swaths of Chennai and neighboring districts were still under 2 1/2 to 3 meters (8 to 10 feet) of water, with tens of thousands of people in state-run relief camps. (Photo by Arun Sankar K./AP Photo)





Flood-affected people use a piece of a plastic water tank as they make their way to the market to buy food items in a flooded locality in Chennai, India, December 5, 2015. (Photo by Anindito Mukherjee/Reuters)





Residents wash clothes recovered from their flood damaged houses on the banks of the Adyar River in Chennai, India, Sunday, December 6, 2015. Indian authorities were investigating possible negligence after 18 hospital patients died when rainwaters from massive floods in southern Tamil Nadu state knocked out generators and switched off ventilators.The worst flooding in a century in Tamil Nadu has left scores of people dead since November. (Photo by Arun Sankar K./AP Photo)





People wade near a stranded truck in a flooded locality in Chennai, India, December 5, 2015. (Photo by Anindito Mukherjee/Reuters)





A man wades through a flooded road along with his bicycle in Chennai, India, December 5, 2015. (Photo by Anindito Mukherjee/Reuters)





A boy wades next to a partially submerged bus in a flooded locality in Chennai, India, December 5, 2015. (Photo by Anindito Mukherjee/Reuters)





A partially submerged government school building is pictured in a flooded area in Chennai, India, December 5, 2015. (Photo by Anindito Mukherjee/Reuters)





Motorcycles stand in a flooded parking area in Chennai, India, December 5, 2015. (Photo by Anindito Mukherjee/Reuters)





A man uses a board to float through a flooded street to reach to a market place in Chennai, India, December 5, 2015. (Photo by Anindito Mukherjee/Reuters)





An aerial view shows vehicles moving on roads in a flood-affected area in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





People walk on a flooded railway track as it rains in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





An aerial view shows a flooded residential colony in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





A man stranded in the floodwaters gestures to an Indian coast guard helicopter for relief materials in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





Flood-affected people gesture to an Indian coast guard helicopter for relief materials in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





An aerial view shows a flooded residential colony in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





An Indian coast guard personnel prepares to drop relief materials in a flood-affected area in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





An aerial view shows a flooded residential colony in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





An aerial view of rain hit area in Chennai, Tamil Nadu on December 03, 2015, in this handout picture provide by Press Information Bureau. (Photo by Press Information Bureau/Anadolu Agency)





An aircraft is seen at the flood-affected airport in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





A flood-affected couple sits along a flooded roadside under a picture of Jayalalithaa Jayaram, chief minister of the southern Indian state of Tamil Nadu, in Chennai, India, December 6, 2015. (Photo by Anindito Mukherjee/Reuters)





Indian diamond trader Mahesh Savani, top center wearing white, poses for a group photo along with brides before mass wedding hosted by him in Surat, India, Sunday, December 6, 2015. 151 young couples tied the knot at the mass wedding hosted by Savani who has been funding the weddings of fatherless women in the city of Surat for several years. Weddings in India are expensive affairs with the bride's family traditionally expected to pay the groom a large dowry of cash and gifts. Hundreds of people, mostly family members and neighbors of the couple, are hosted at lavish meals over a number of days adding to the costs. (Photo by Ajit Solanki/AP Photo)





Aeronautical Engineers of the Air Force Technical College (AFTC) of the Indian Air Force take part in a passing out parade in Bangalore on December 4, 2015. The Parade marks the culmination of 74 weeks of training in Aeronautical Engineering, Military Leadership, Managerial Skills and Ethos of an air warrior. The passing out batch comprised 136 officers, including 37 women and 11 international officers. (Photo by Manjunath Kiran/AFP Photo)