Rescue operations are on on a large scale and the Indian Navy and Army have been pressed into service. Here are some useful helpline numbers for anyone stranded in the floods or needing help.
This is the Indian Navy's helpline number in Chennai: +914425394240
The Indian Army's helpline: 9840295100
Helplines provided by Tamil Nadu government:
Chennai city: 1070
Chennai Corporation: 1913 and 044-4567 4567