
New Delhi: Delhiites woke up on Thursday to a thick envelope of smog as air quality in the national capital and in adjoining regions, dipped into severe category again.
The Air Quality Index (AQI) in the national capital at 8 am was at 364 (in the 'Very Poor' category) and at 7 am the recorded AQI stood at 408 ('Severe'). Unfavorable meteorological conditions with slower wind speed and sudden spike in farm fire incidents are attributed to the dip in air quality.
An AQI between 401 and 500 is categorized as severe.