The Department of Meteorology today issuedRed Advisory for Heavy Rain, Strong wind and Rough seas says that Due to the active cloudiness in the sea area extending from Puttalam to Kankasanturai via Mannar, the possibility for heavy showers or thundershowers and sudden roughness,associated with sudden increase of wind speed (up to 70-80 kmph) in the above given sea areas is high.Naval and fishing communities are requested to be vigilant in this regard.