Dense fog has affected visibility in Delhi, Haryana, Punjab and Uttar Pradesh since Monday.
Delhi woke up to dense fog for the second consecutive day, resulting in operations being stalled at both the Indira Gandhi International (IGI) Airport and the railway stations.
The visibility at the Delhi airport was 500 metres which delayed the arrival of 11 worldwide flights, while there was no delay in departures. Poor visibility also disrupted train services.
A thick blanket of fog continued to envelope the national capital and several other parts of North India on Thursday.18 trains have been rescheduled, 60 delayed and 14 others have been cancelled. It improved significantly as the day progressed, a meteorological department official said.
The weather condition is likely to remain the same for the next few days, according to the India Meteorological Department.
The minimum temperature was recorded at 7.2 degrees Celsius, the season's average. "Maximum and minimum temperatures are expected to hover around 20 degrees Celsius and 6 degrees Celsius", the Met department said.