The IMD has issued heavy rainfall and dense to very dense fog warnings for several states/UTs for Sunday. Heavy rainfall is very likely over Tamil Nadu and Puducherry. Dense to very dense fog conditions are likely over Punjab, Haryana, Chandigarh, Delhi and Rajasthan. Dense fog conditions are likely over Uttar Pradesh, West Bengal, Sikkim, Odisha, Nagaland, Manipur, Mizoram and Tripura.