India, Jan. 20 -- Delhi's air quality improved marginally to the "very poor" category after three days of "severe" pollution levels, the worst streak for January since 2021, even as shallow to moderate fog enveloped the city, and the minimum temperature of 7.2degC was around normal for this time of the year. The mercury went up to 26.7degC on Monday, or seven degrees above normal. The maximum temperature is likely to hover between 23-25degC on Tuesday.

An average Air Quality Index (AQI) of 395 (very poor) was recorded at 8am on Tuesday, down from 410 (severe), on Monday, even as toxicity in the air remained high. The AQI is likely to remain in the "very poor" category until at least Friday. Delhi recorded an AQI of 440 on Sunday and 400 ...