The IMD has issued a heavy to extremely heavy rainfall warning for 16 states/UTs for October 4 (Saturday). According to IMD's latest bulletin, heavy to extremely heavy rainfall is very likely over Bihar, Uttar Pradesh, West Bengal, Sikkim, Arunachal Pradesh, Assam, Meghalaya, Chhattisgarh, Madhya Pradesh, Jharkhand, Nagaland, Manipur, Mizoram, Tripura, Tamil Nadu and Puducherry.