The Regional Meteorological Department has predicted rainfall over North Coastal Tamilnadu including Chennai for the next three days. In a special message, the department said that under the influence of a cyclonic circulation over Lakshadweep and the neighbourhood and also due to a trough of easterlies over Southwest Bay of Bengal, heavy rainfall warnings in isolated areas may occur in eleven districts including Thoothukudi and Tirunelveli. Heavy to very heavy rainfall has been predicted in isolated places including Chennai, Tiruvallur and ten other districts from tomorrow. Fishermen have been advised to stay away from fishing activity in the seas.<br />