Port Blair, Oct. 19: Heavy rain (07-11 cm) is likely to occur at one or two places over Andaman & Nicobar Islands on Oct. 20, 21 & 22. Due to likely formation of low pressure area during next 24 hours and likely intensification of the system, fishermen have been advised not to venture into the sea till Oct. 22. 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.