New Delhi [India], January 11 (ANI): Cold wave continued its grip over North India on Thursday with dense fog shrouded major cities, including Delhi, reducing visibility and impacting air and train travel. Delhi shivered with overall temperature recorded at 8.8-degree Celsius temperature on Thursday as fog engulfed the city. Palam Observatory, reported a visibility level of 100 metres at 5:30 am which improved to 500 metres by 7 am due to surface winds. Safdarjung weather station recorded 5.8 degree Celsius minimum on Thursday at 830 am with a departure of 1.6 degrees Celsius from yesterday. P…