The AQI in Vasant Vihar's C Block area was 1,336 at 11.55 am, as per Swiss air quality monitor IQAir. An AQI above 300 is considered 'hazardous' for humans.

Air quality reaches the ‘severe’ category with an AQI of 426 at 9 a.m. on Thursday, impacting health and ranking as second most polluted city.

Every year, Delhi and northern states battle hazardous air during the winter months of October to January due to plummeting temperatures, smoke, dust, low wind speed, vehicular emissions and crop stubble burning. This time, experts say that the condition is likely to get worse in the coming days.

Delhi recorded 'severe' air quality for a second consecutive day on Thursday as dense fog continued to shroud the city along with other parts of north India. Most of the stations in the national capital logged AQI well above the 400 mark,

Delhi residents woke up to ‘severe’ air quality on Thursday morning (November 14), a day after the national capital recorded the worst AQI in the country, with dense fog blanketing the NCR, reducing visibility.

Delhi overtook Pakistan ’s Lahore as the world’s most polluted city in Swiss group IQAir’s live rankings, with an air quality index (AQI) score of more than 1,000, which is considered “hazardous”, but India ’s pollution authority said the AQI was around 350.