Relentless burning of firecrackers by people on Diwali led to the worsening of air quality levels, with the AQI reaching close to 'severe' category at many places in Delhi.

The air quality index in most of the 40 monitoring stations in Delhi remained in the "very poor" category.

Delhi engulfed in smog due to Diwali firecrackers, violating ban, worsening air quality, and posing health risks.