Delhi's air quality dips to 'severe' category on Diwali, thick smog engulfs city

The air quality in Delhi plunged to the "very poor" category on Thursday morning, with a thick layer of smog covering parts of the city as residents in the national capital prepare to celebrate Diwali today. As per data from the Central Pollution Control Board (CPCB), the Air Quality Index (AQI) in Delhi's Anand Vihar stood at 542 (Severe) at 11 am.