A depression near Sri Lanka and India's southern tip is expected to bring rains and strong winds across Tamil Nadu and Puducherry, reports say.
The weather office has forecast heavy showers on Thursday. It also said steady rainfall may occur in Chennai for 48 hours and rainwater swept into homes and buildings in some areas bordering Chennai.
Rainfall has been heavy in Tirunelveli, Tuticorin, Virudunagar, Ramanathapuram, Coimbatore, Nilgiris, Erode, Salem, Namakal, Cuddalore, Villupuram and Tiruvanamalai districts, according to reports.
A private weather forecast says northern districts of Tamil Nadu will be hit by strong winds at the weekend.