New Delhi, Nov. 19 -- The national capital woke up to a dense blanket of toxic smog on Wednesday morning, with the average Air Quality Index (AQI) touching 392 at 9 am in the "very poor" category, according to the Central Pollution Control Board (CPCB).

Air quality showed no improvement from Tuesday, when the AQI was recorded at 341 at 7 am and 374 at 4 pm.

Several parts of the city remained shrouded in a thick layer of smog, reducing visibility and raising health concerns. At the Indira Gandhi International Airport (T3), the AQI was recorded at 342.

As per CPCB classification, an AQI between 0-50 is considered 'good', 51-100 'satisfactory', 101-200 'moderate', 201-300 'poor', 301-400 'very poor', and 401-500 'severe'.

As of 9 am, AQI...