Thru the last week there was heavy activity over the Southern extreme end of Tamilnadu OR India.
Take a look at the Satellite pic dated ....
It clearly shows a small tropical low system moved from South-Bay crossing Srilanka and Then brushing the Southern Tip.
This caused widespread very heavy rain over that region.
Take a look at the present satellite pic, the South-bay is somewhat calm after 2 months of intense activity.
This calm is not going to be long...!