As per IMD, "Zero visibility has prevailed over Palam since 4.30 IST with southeasterly winds blowing at 6-8 kmph."

Delhi recorded a minimum temperature of 6 degrees Celsius, 0.9 notches below normal, while the air quality was recorded in the severe category

According to the CPCB air quality bulletin, the AQI at 9 am was recorded in the "severe" category with a reading of 408. Yesterday at the same time it was 299

The weatherman has forecast very dense fog for the day , with the maximum temperature expected to settle around 16 degrees Celsius.

An AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe".

Meanwhile, in view of the dense fog, the Delhi Airport issued an advisory for the passengers stating that there has been impact on flight departures. It further advised the passengers to contact their respective airlines for updated flight information.

As the temperature dipped, several night shelters in different parts of the national capital were seen with all its beds occupied.

The Delhi Urban Shelter Improvement Board (DUSIB) has also set up 235 pagoda tents to provide shelter to homeless people

Night shelters have been set up in several areas of the national capital, including AIIMS, Lodhi Road, and Nizamuddin flyover.