Port Blair, Aug 27: Indian Meteorological Department has issued Heavy Rainfall Warning for tomorrow. “Heavy rain may occur at isolated places over Andaman and Nicobar Islands during next 24 hours. Southwest monsoon active over A&N Islands. Rain or thundershower would occur at most places with heavy rainfall at isolated places. Maximum & minimum temperatures will be around 27 degree C and 24 degree C respectively on 28th August, 2012,” a release issued by IMD said here today.