According to data from the Central Pollution Control Board (CPCB), several areas across the city recorded the worst air quality, with AQI readings exceeding 400.
As per the CPCB, Anand Vihar recorded an AQI of 455, while Bawana registered an AQI of 409 and Wazirpur 443. Areas such as Okhla Phase 2 (403), Rohini (440), Punjabi Bagh (426), and Patparganj (431) also saw deteriorating air quality, settling in the 'severe' category.
The India Meteorological Department (IMD) has issued an orange alert of very dense fog in the national capital on Monday, with minimum temperatures likely to hover between 6 and 8 degrees Celsius.
On Monday, visuals shared by ANI and PTI show a dense layer of toxic smog engulfing New Delhi, significantly reducing visibility across the city.
#WATCH | Delhi | Visibility in the national capital is affected as a layer of toxic smog engulfs the city. CPCB claims that the AQI in the area is at '400',
categorised as 'Very Poor'.
Visuals from Feroz Shah Road pic.twitter.com/EaUmwjoSyH
— ANI (@ANI) December 29, 2025
VIDEO | Dense fog blankets the national capital, reducing visibility and affecting operations. Visuals from Anand Vihar bus depot.
(Full video available on PTI Videos – https://t.co/n147TvrpG7) pic.twitter.com/gbJoFFN5xy
— Press Trust of India (@PTI_News) December 29, 2025
#WATCH | Rehearsal for the 2026 Republic Day parade underway at Kartavya Path in Delhi pic.twitter.com/9HqstzyPwO
— ANI (@ANI) December 29, 2025
#WATCH | Delhi: Visibility in the national capital is affected as a layer of toxic smog engulfs the city. CPCB claims that the AQI in the area is at '401', categorised as 'Severe'.
Visuals from the area around the Kartavya Path) pic.twitter.com/vAxcH8dT58
— ANI (@ANI) December 29, 2025
VIDEO | Delhi: Dense fog blankets the national capital, affecting visibility and train operations. Visuals from New Delhi Railway Station.
(Full video available on PTI Videos – https://t.co/n147TvrpG7) pic.twitter.com/ZHX1lfkJfK
— Press Trust of India (@PTI_News) December 29, 2025
The runway at the Indira Gandhi International Airport also witnessed dense fog, resulting in several flight delays.
#WATCH | Poor visibility witnessed at the runway at IGI airport as dense fog engulfs Delhi-NCR; several flights delayed
Delhi Airport issued a passenger advisory at 8 am stating, "Flight operations are currently being carried out under CAT III conditions due to dense fog, which… pic.twitter.com/YYbDWbppu8
— ANI (@ANI) December 29, 2025
Amid zero-visibility fog on Monday morning, around 200 flights were delayed, while some were cancelled at the Delhi airport. According to FlightRadar24 data, as many as 144 departures and 51 arrivals were delayed at around 8:45 am on Monday, while six flights were cancelled.
The airport sources added that as many as 128 cancellations and 8 diversions were reported from Delhi Airport due to dense fog as of 11 am.
As dense fog enveloped the national capital, Delhi Airport issued a passenger advisory at 10 am. The advisory stated, "Due to persistent dense fog, flight operations continue to remain under CAT III conditions which may result in flight delays. For the most up-to-date flight information, we request you to contact your respective airlines or visit our website."
Passenger Advisory issued at 10:00 hours.
Please click on this link for real-time winter travel updates: https://t.co/KkKldKUlLQ#DelhiAirport #PassengerAdvisory #DELAdvisory pic.twitter.com/idG2Y54iAt
— Delhi Airport (@DelhiAirport) December 29, 2025
Several airlines also advised passengers to check their flight status before arriving at the airport. IndiGo Airlines issued an advisory, stating that operations may be slower than usual as fog continues to persist across Delhi and several airports in northern India.
Travel Advisory
Fog continues to persist across Delhi and several airports in northern India. Visibility remains reduced and, as a result, flight movements are presently slower than normal, with some delays being experienced.
We will continue to manage operations under the…
— IndiGo (@IndiGo6E) December 29, 2025
"Fog continues to persist across Delhi and several airports in northern India. Visibility remains reduced and, as a result, flight movements are presently slower than normal, with some delays being experienced. We request you to keep a check on your flight status. Please be assured that our teams are right here to support you at the airports and remain ready to assist you throughout your journey today," it said.
In light of the weather department's forecast of foggy conditions, Air India issued a caution on Sunday evening indicating that flight delays were expected.
Weather forecast for tomorrow morning indicates dense fog with low visibility in parts of northern India, including Delhi, which is likely to impact flight operations.
We have taken proactive steps to minimise disruptions (learn more at https://t.co/RJc1tVFxuD).…
— Air India (@airindia) December 28, 2025
"Weather forecast for tomorrow morning indicates dense fog with low visibility in parts of northern India, including Delhi, which is likely to impact flight operations. If you are flying with us tomorrow, we encourage you to check your flight status before heading to the airport and allow extra time for your journey," it wrote on X.
