Delhi experienced its coldest morning of the season with temperatures dropping to 4.2 degrees Celsius, the lowest in two years, accompanied by dense fog and a persistent cold wave. Air quality remained in the 'very poor' category, with the AQI around 300-366 in many areas, though some saw slight improvement to 'poor'. Flight operations were impacted by low visibility. The India Meteorological Department issued a yellow alert for cold wave and fog conditions for the coming days.