AQI spikes on a day with second highest max temp - Lahore enjoys sunny weather but remains the most polluted city in AQI rankings - GRAP 3 curbs back in Delhi-NCR as AQI continues to remain in severe category - Delhi weather: Freezing winds and dense fog grip city, AQI remains 'very poor', flight services hit - Delhi weather: Dense fog and cold wave disrupt rail services, AQI soars to 'very poor' - Centre rolls back GRAP-3 pollution curbs in Delhi-NCR as AQI improves - AQI worsens, BMC issues fresh pollution guidelines - Fog and drizzle in Delhi-NCR, AQI dives to 'severe' - Wind speed dips, AQI turns 'poor' overnight - Delhi air pollution eases as AQI moves to 'moderate' category