In the worst case of air pollution in the world, an area in Pakistan's Lahore recorded an AQI of nearly 1600 on Friday. According to Swiss monitor IQAir, the CERP Office area in Lahore had an AQI of 1587 on Friday morning.

Delhi continues to battle severe air pollution, with the air quality index (AQI) remaining in the “severe” category for the third consecutive day. The AQI stands at 498, making Delhi the world’s second most polluted city, behind Lahore, Pakistan, which recorded an AQI of 770 at 7 am, according to IQAir, a Swiss air quality monitoring company.

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 choking New Delhi has ground outdoor work to a halt and disrupted air travel in the Indian capital.

The top five polluted areas in Delhi this morning are Jahangirpuri, Bawana, Wazirpur, Rohini, and Punjabi Bagh.

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.

As of early Thursday morning, the AQI at key locations like Anand Vihar, Bawana, Dwarka Sector 8, and Jahangirpuri surpassed 400, entering the "severe" category.

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.