India, Jan. 11 -- Cold wave conditions continued to grip north India on Sunday as Delhi residents woke up to a chilly morning as the minimum temperature fell to 4.8 degrees Celsius, as moderate fog covered the region, according to the India Meteorological Department (IMD). While the overall air quality index (AQI) improved to the 'poor' category, Delhi's Indira Gandhi International (IGI) Airport issued an advisory for passengers.

On Saturday, Delhi saw its coldest morning of the season. The temperature slipped to 4.2 degrees Celsius, which was 2.7 degrees Celsius lower than usual, as per data from the India Meteorological Department. Air quality, however, worsened and reached the higher end of the 'very poor' category. The air quality in...