The IMD has issued heavy to extremely heavy rainfall warning for several states/UTs for Saturday (July 18). It is very likely over parts of West Bengal, Sikkim, Arunachal Pradesh, Assam, Meghalaya, Chhattisgarh, Uttarakhand, Bihar, Madhya Pradesh, Uttar Pradesh, Himachal Pradesh, Jharkhand, Karnataka, Kerala, Puducherry, Nagaland, Manipur, Mizoram, Tripura and Odisha.