The India Meteorological Department (IMD) had issued a yellow alert for the morning in Delhi, warning of dense fog and cold wave-like conditions across the region.

Delhi`s air quality remained in the `very poor` category in the morning as several parts of the national capital woke up under a thick layer of smog. The combined impact of pollution and fog further reduced visibility, compounding travel disruptions.

Rail services were hit badly, with many trains running several hours behind schedule and some being diverted.

Flights in multiple cities, including Delhi, were also delayed, while the possibility of cancellations could not be ruled out.

According to railway officials, more than four dozen trains are running behind schedule due to dense fog across northern India. Train speeds have been reduced as a safety measure, leading to major inconvenience for passengers.