On Monday, the top court took note of the fact that the Air Quality Index (AQI) entered into the ‘severe plus’ category and directed all Delhi-NCR states to immediately set up teams to strictly enforce anti-pollution GRAP 4 restrictions,

The AQI in Delhi-NCR is in the ‘severe plus’ category. AQI between 0-50 is considered “good”, 51-100 is “satisfactory”, 101-200 is “moderate”, 201-300 is “poor”, 301-400 is “very poor”, 401-500 is “severe” and above 500 is a “severe plus”.

According to reports, more than 20 trains were delayed and at least eight flights diverted due to low visibility.