India, Dec. 16 -- Delhi's air quality dipped to the 'very poor' category on Tuesday after three straight severe days as fog intensity reduced over the national Capital, aided by an increase in wind speed. Shallow fog was recorded over the national Capital on Tuesday, in contrast to very dense fog on Monday, even as flights continued to be impacted at Delhi's Indira Gandhi International (IGI) airport.

The 24-hour average air quality Index (AQI) stood at 377 at 8am on Tuesday. It was 427 at 4pm on Monday. The AQI peaked at 461 on Sunday in what was the second worst December air day ever on record.

Meanwhile, over 200 flights stood delayed at the airport on Tuesday till 8am - a cascading effect from Monday's very dense fog spell which saw ...