Thunderstorm with lightning likely on Wednesday Delhi battles to breathe as major pollutants fall in 'poor' category Rains bring no respite from pollution to Delhi AQI dips to ‘very poor’ category, likely to improve tomorrow Delhi-NCR receives light rain; dense fog expected in next two days Air quality shows slight improvement in Delhi, reaches ‘very poor’ category Delhi's AQI remains in 'very poor' category for third consecutive day Delhi continues to reel under 'very poor' air quality Delhi's AQI remains in 'very poor' category on Saturday Delhi: Air pollution improves marginally; many areas still in ‘severe’ category