The air quality in parts of Delhi deteriorated to the severe category on Friday. In Anand Vihar, the AQI was recorded at 403 at 9:00 am, at 405 in Okhla Phase-2 and at 412 in Wazirpur. In Mundka, the AQI was recorded at 435. A video shared by ANI showed thick layer of smog at India Gate and Kartavya Path.