The Regional Meteorological Centre (RMC) in Chennai has forecast rains in several parts of the state including the capital city tillĀ August 21.”Due to the atmospheric circulation prevailing over Tamil Nadu, fromĀ todayĀ till the 21stĀ of August, there may be light to moderate rain at one or two places in Tamil Nadu, Puducherry and Karaikal,ā the RMC said in a statement.