Delhi's air quality deteriorated to 'severe' with an AQI of 432, CPCB reported, as smog engulfed the city for the second consecutive day. Several areas in the capital region recorded an AQI of over 450 with Anand Vihar recording the highest AQI at 473. Ghaziabad, Noida, and Gurugram also reported worsening pollution, with AQIs of 378, 372, and 323, respectively.