The India Meteorological Department (IMD) has issued dense fog warning for several states/UTs for the next two days. Dense fog is very likely over Punjab, Haryana, Chandigarh, Delhi, Uttar Pradesh, West Bengal, Sikkim and Bihar in night/morning hours on Sunday and Monday. It is very likely over Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura in night/morning hours on Sunday.