Delhi's average air quality index hit 376 on Sunday, remaining in the 'very poor' category as thick smog enveloped the capital.
Twelve of 59 monitoring stations recorded 'severe' air quality, with Jahangirpuri reporting the worst index level at 463.
Pollution levels are forecast to reach 'severe' thresholds from November 9, driven by firecracker emissions, stagnant weather, and stubble burning.