The IMD has issued heavy to extremely heavy rainfall warning for several states for Wednesday (August 20). It is likely over Gujarat, Arunachal Pradesh, Assam, Meghalaya, Karnataka, Goa, Maharashtra, Bihar, Chhattisgarh, Andhra Pradesh, Rajasthan, Himachal Pradesh, Kerala, Madhya Pradesh, Nagaland, Manipur, Mizoram, Tripura, West Bengal, Sikkim, Telangana, Uttarakhand and Puducherry.