The IMD has issued heavy to very heavy rainfall warning for 20 states/Union Territories for Wednesday (September 17). It is very likely over West Bengal, Sikkim, Andaman & Nicobar Islands, Arunachal Pradesh, Assam, Meghalaya, Bihar, Uttar Pradesh, Jharkhand, Karnataka, Goa, Maharashtra, Nagaland, Manipur, Mizoram, Tripura, Andhra Pradesh, Tamil Nadu, Puducherry and Telangana.