In the wake of an unabated downpour, the scale of rainfall that was recorded in some areas of these districts was as double as to what Chennai and its neighbours recorded earlier this month during the landfall of Cyclone Michaung.
The regional centre of IMD in Chennai had given a staunch instruction to the people not to venture out of the homes on December 4 and 5 unless there is an emergency.
The disturbing scale of rainfall has come days ahead of Cyclone Michaung, which will make a landfall on the northern districts of Tamil Nadu, including Chennai, during the first week of December.
It has been reported that the brewing system over the Bay of Bengal would intensify into a depression and would eventually become a cyclone by December 2.
The Tamil Nadu government has instructed 27 District Collectors to enforce the Standard Operating Procedures to handle disasters, beef up the district machinery and take adequate preparedness measures.
On Thursday, the Tamil Nadu government warned the fishermen not to venture into the sea for the next four days from November 18 to November 21, until further orders.