Delhi's air quality reached "severe" levels (AQI 401) on Tuesday morning, despite light rain the previous day. Bawana recorded the highest AQI (455), while IHBAS Dilshad Garden showed the best (222). Cold wave conditions persist in northern India, with temperatures dropping sharply after light rain and snowfall in Himachal Pradesh and Jammu & Kashmir. The IMD issued a cold wave warning for Himachal Pradesh.