"A thick blanket of fog with visibility less than 350 meters in entire Punjab, Haryana, and Chandigarh almost blinded the entire region," the MeT office said here.
In the wake of poor visibility due to foggy weather, air, rail and road traffic remained adversely affected in the region, officials said.
The morning flights from Chandigarh Airport were cancelled while several trains criss-crossing the region, including, Shan-e-Punjab, Shatabdi, Paschim express and Kalka express, running hours behind schedule, officials said.
The day as well as night temperatures will continue to fall in the region in days ahead with no respite from foggy conditions, according to the MeT office forecast.
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The minimum temperatures hovered between one to five degrees Celsius below normal in the region as chilling conditions confined people indoors.
Narnaul was the coldest place with a low of 1.6 degrees, four notches below normal.
While Hisar settled at a low of 1.8 degrees Celsius, five notches below normal, the minimum temperature at Amritsar was 3.8 degrees Celsius.