India, Dec. 30 -- Delhi's air quality on Tuesday remained in the 'very poor' category with a dense fog taking over the city. The Air Quality Index (AQI) stood at 385 as of 6 am.

On Monday, the overall 24-hour average AQI stood at 401, falling in the 'severe' category. As per the India Meteorological Department, the general visibility of Delhi at 6:30 in the morning was 350 metres.

The IMD also issued a fog alert for the night of December 29 and the morning of December 30. It sounded a warning for dense to very dense fog expected in Haryana, Chandigarh & Delhi, Punjab, Uttar Pradesh, and parts of the Northeast, East, and North India.

The weather panel also issued a red alert for dense fog for Tuesday, HT reported earlier.

Low visibilit...