As Chennai struggles to find its footing after the massive floods that has killed over 100 people, experts say it was a man-made disaster that was waiting to strike the city. Over the years, water bodies across the city have been filled up and built upon, often by politicians with interests in the real estate business, say environmentalists. The result: During incessant rains, water overflows. In 2005 a similar deluge shook the city. This time, around 12000 people had to be evacuated in Chennai alone.