With the advent of the North East monsoon and due to an upper air circulation prevailing near Kanyakumari, there have been intermittent heavy showers in many districts of Tamil Nadu. Heavy downpour has also been prevalent in Coimbatore and Nilgiris due to a depression in the Middle Eastern part of the Arabian Sea.<br />''<br />''Schools have been closed as a preventive measure in many districts. Hill train service to Ooty has been halted. The Regional Met Department has predicted more rain for the next 24 hours. Light to moderate rains in Chennai and the Suburban areas mark have worried those who are waiting to shop for Diwali. <br />