Andaman and Nicobar - most affected
Tropical paradise islands are the worst affected[thank you for the link, Kartik Talamadupula]
The current loss of lives in the Andaman and Nicobar Islands currently stands at 3,000 and rising (it might well go up to 4,000).
When we say 3,000 people in the A&N Islands, it amounts to around 9% of the islands' population.
On a proportionate basis, the loss of lives in the islands must surely rank as one of the worst disasters ever in India, perhaps in the world.