NEW DELHI: The capital's air quality continued to deteriorate for the fourth day running, with the city's average AQI inching closer to 'severe' levels on Sunday. The day's average air quality index was recorded at 370, in the upper range of 'very poor', the second worst of the season so far after October 30, when the index was at 373. Delhi woke up to another morning of toxic smog but, just as on the previous day, winds picked up towards late afternoon, providing some relief. The average AQI at 8 am Sunday was 391, close to the 'severe' range that starts from 401. By 11 am, the air remained just as bad, with the AQI at 389. The day's official 24-hour average is taken at 4 pm, when the air had improved a bit. The share of pollutants from farm fires in Punjab and Haryana on Delhi's PM2.

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