Port Blair, May 15: Heavy rain (7-11cm) is likely to occur at one or two places over Nicobar Islands on May 19. For further enquiries/information, one may contact helpline of State Emergency Operation Centre at Helpline No. 1070 & District Emergency Operation Centre at Helpline No. 1077. For any emergency/assistance at sea, call Coast Guard SAR Agency at Toll Free number 1554.