The air quality in the national capital dipped to the 'very poor' category on Friday morning as Delhi's overall Air Quality Index (AQI) stands at 312 as of 8 am, according to the Central Pollution Control Board (CPCB).
CAT III, or Category III, is an approach system that allows flights to land safely during poor visibility conditions and ensures operational functionality for compliant flights.
As the cold wave grips the national capital, some people are forced to take refuge in night shelters in search of food, shelter and some warmth to help them sustain through the chilling night.
The temperature further dropped in Delhi on Sunday. According to the India Meteorological Department, the temperature in Delhi at 5.30 am on Sunday was recorded at 6 degrees Celsius. A day earlier it was 9.4 degrees Celsius.
According to India Meteorological Department (IMD), the minimum temperature was recorded 4.9 degree Celsius in Safdarjung area while it was 6.2 degree Celsius in Palam.