Flights at Delhi's IGI Airport were delayed due to low visibility caused by fog. The India Meterological Department forecasted that visibility may reduce in moderate fog and then improve with shallow fog. Dense fog conditions are expected in isolated places in Delhi, East Uttar Pradesh, and Tripura. Trains bound for Delhi were also running behind schedule. The weather forecast predicts dense to very dense fog in the morning over parts of Punjab, Haryana, Chandigarh, and Uttar Pradesh till January 26 morning.