A thick layer of fog blanketed
For the past four days, the minimum temperature has been hovering around 3 to 4 degrees Celsius, and the cold wave conditions are likely to continue till Wednesday.
According to
The IMD has also issued an orange alert for very dense fog, which has also affected the air and land traffic leading to several delays in flights and trains.
Over 70 flights have been delayed and many were reported to have been cancelled.
An advisory has also been issued for the travellers, which said, "While landing and takeoffs continue at the
Moreover, 30 trains have been delayed with the maximum number of hours being more than six.
At 7 a.m., 100 m visibility was reported at the Palam Airport and 00 m half an hour later, whereas Safdarjung Airport recorded 50 m visibility.
The IMD classifies fog intensity into four types: shallow, moderate, dense and very dense fog.
The visibility ranges from 999 m to 500 m, 499 m to 200 m, 199 m to 50 m and less than 50 m, respectively.
The Air quality continued to remain in the 'very poor' category at several stations across the city.
In the Anand Vihar area, PM2.5 levels were recorded to be in the 'severe' category standing at 424 and PM10 reached 245 or 'poor', according to the Central Pollution Control Board (CPCB).
The Air Quality Index (
The Indira Gandhi International (IGI) Airport T3 also witnessed PM2.5 levels at 420, the 'severe' category while the PM10 was at 375, falling under the 'very poor' category.