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.

Air pollution in India's national capital increased to 'severe' on an official index on Wednesday for the first time this season as temperatures and wind speeds dropped, reducing visibility and affecting some flights.

Stay informed with our live blog covering India’s latest in politics, economy, crime, and general news. Get real-time updates on political developments, financial trends, crime reports, and important events across the country.