An aerial view from an Indian relief helicopter shows flood affected areas of Chennai on December 5, 2015.    Thousands of rescuers are racing to evacuate victims of the Tamil Nadu flooding, which has claimed nearly 300 lives since November 9. Weather officials said rainfall in Chennai had diminished since earlier in the week, but parts of the city of 4.6 million people remained submerged.   AFP PHOTO / AFP / STR        (Photo credit should read STR/AFP/Getty Images)