Delhi Fog Alert, Dec. 29 -- Visibility across the national capital deteriorated sharply on Monday, 29 December, as a dense layer of fog engulfed Delhi, disrupting flight operations and prompting advisories from the airport operator and airlines.

The Indian Meteorological Department (IMD) has issued orange alert of very dense fog for Monday, with maximum and minimum temperatures likely to hover around 22 and 7 degrees Celsius, respectively.

The national capital recorded air quality in the "very poor" category on Sunday with an overall Air Quality Index reading of 390, according to the Central Pollution Control Board (CPCB).

According to data on the CPCB's Sameer App, 19 monitoring stations in Delhi reported air quality in the "severe" c...