India, Nov. 12 -- Delhi's air quality remained "severe" for a second straight day as a smog hung over the city, keeping pollutants trapped close to the surface due to dipping temperatures. The 24-hour rolling average air quality index (AQI) was 413 at 8am, marginally lower than the 4pm reading of 428 on Tuesday, when the Central Pollution Control Board (CPCB) releases its daily national bulletin.

On Tuesday, Delhi recorded the worst AQI since December 19 last year, when it was 451, prompting the Commission for Air Quality Management (CAQM) in NCR and Adjoining Areas to implement measures under Stage-3 of the Graded Response Action Plan (Grap).

Forecasts show winds are likely to marginally pick up on Wednesday, and the AQI is expected to...