Delhi’s air quality recorded a significant deterioration during Diwali, reaching an average AQI of 376. Major monitoring stations reported severe pollution, with 14 categorized as severe. Visibility was severely affected early Monday due to dense fog and smog covering the city. Firecracker usage persisted beyond permitted times despite restrictions, worsening pollution levels. The Air Quality Early Warning System forecasts that unhealthy air quality conditions may continue in the coming days.