In Punjab, the dense fog continues along with severe cold waves. The average minimum temperature in the state has dropped to zero point 2 degrees Celsius today. Dense fog has severely affected rail, road, and air traffic. <br />''<br />''The minimum temperature was recorded at minus 0.2 degrees Celsius in Ballowal Saunkhri of Shaheed Bhagat Singh Nagar district today. Similarly, in other cities also the minimum temperature remains between 1 to 6 degrees Celsius. A dense fog cover since late night and chilly winds are increasing the woes of the people. Due to these weather conditions, the state government has closed schools up to fifth class till 20th January. <br />''<br />''<br />