The India Meteorological Department (IMD) has issued heavy to very heavy rainfall warning for several states for the next two days. It is very likely over Andaman and Nicobar Islands, Kerala, Puducherry, Tamil Nadu. Meanwhile, dense fog conditions are very likely to prevail during night/early morning hours in Uttar Pradesh, Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura on Tuesday.