Port Blair, May 12: Thunderstorm and lightning is likely to occur at one or two places over Andaman & Nicobar Islands on May 13. For further enquiries / information 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.