The India Meteorological Department (IMD) has issued heavy rainfall and dense fog warnings for several states and UTs for January 19 (Sunday). Heavy rainfall is very likely over Tamil Nadu, Puducherry and Kerala. Dense fog is very likely over Punjab, Haryana, Chandigarh, Delhi, Uttar Pradesh, Rajasthan, Madhya Pradesh, West Bengal, Sikkim, Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura.