Chennai floods: Google spreadsheet comes to city's rescue

The rains that have virtually broken a 100-year-old record with one day's rainfall covering a month's average have flooded areas in Vadapalani, Valasaravakkam and Nandamvakkam as nearby lakes overflowed into the city. The situation has worsened in suburban areas of Tambaram and Mudichur after the Chembarakam lake overflowed and an unprecedented 26,000 cusecs of water was released flooding the downstream areas. These areas had already suffered heavily during the earlier spells of rain.