Cyclone Ditwah's remnant hammered north Tamil Nadu, especially Chennai and Tiruvallur, on Wednesday, December 3, 2025. The system is set to weaken into a low-pressure area by Thursday. The Regional Meteorological Centre issued a yellow alert for heavy rain in Krishnagiri, Dharmapuri, Thoothukudi, Kanniyakumari, and four other coastal districts. Chennai will see light to moderate showers. Ennore faced torrential rain for three days, measuring 15 cm on Wednesday alone and totaling nearly 56 cm since the cyclone began. Other parts of Chennai like Puzhal, Villivakkam, and Tiruninravur received 3-5 cm of moderate to heavy rain. South Chennai reported lighter showers. Tiruchi and Ramanathapuram districts also saw rainfall on Wednesday. The cyclone moved slowly inland causing rain along its path. On Wednesday, Ennore and Hindustan University recorded 15 cm rainfall, and Chetpet, Tiruvannamalai got 13 cm. Many areas in Chennai, Pudukkottai, and Villupuram reported moderate to heavy rain. The persistent showers have cut Chennai’s seasonal rainfall deficit to just 2%. Due to heavy rain, the Red Hills reservoir shutters were opened for the sixth time this monsoon on Wednesday. Water discharge was raised to 2,500 cusecs by evening as the reservoir reached 96% capacity after receiving 6.4 cm rain. Chembarambakkam and Poondi reservoirs maintain minimal releases. Officials said all five reservoirs hold about 86% of their storage, and controlled water release continues to avoid floods downstream. Meanwhile, Chennai Metrowater treated 962.34 million litres of sewage on Wednesday, a big jump from 700 million litres on dry days, showing the impact of the rain on city services. The cyclone’s movement, heavy showers, and water management are critical as the Northeast monsoon continues to nourish Tamil Nadu’s parched lands.