Nivar will move northwestwards and weaken further into a cyclonic storm during the next three hours, the IMD said.
According to the weather department, the cyclone lays centred over coastal Tamil Nadu and Puducherry about 25km north of Puducherry with the wind blowing at a speed of 90-100 kmph gusting to 110 kmph.
The officials of power utility were also on the job to restore power supply wherever it got disrupted due to the cyclone.
In Tamil Nadu`s Villupuram district, police said the fallen trees have been removed to ease the flow of traffic.
The power supply in several areas was disrupted. The concerned administration was removing the fallen trees.
On its way, the cyclone uprooted several trees and power lines in Tamil Nadu's Cuddalore, Marakkanam and in Puducherry.