The heavy rainfall and associated thunderstorms may disrupt Deepavali celebrations and travel plans across Tamil Nadu. The eight districts under alert—Thanjavur, Tiruvarur, Nagapattinam, Mayiladuthurai, Pudukkottai, Ramanathapuram, Thoothukudi, and Kanniyakumari—are at higher risk of localised flooding, waterlogging, and damage to vulnerable structures. Gusty winds of 30-40 kmph could uproot small trees and damage crops. Lightning poses a risk to outdoor activities, and residents in affected areas should exercise caution.