In Rajasthan, dense fog has reduced visibility at many places in the state today, December 31. After a slight respite of two days, the cold has taken hold again. <br />''<br />''The cold wave has started blowing due to the cold winds coming from the north. Dense fog has affected rail and road traffic. Today, the minimum temperature of Sirohi's Mount Abu was recorded at 2 degrees Celsius.<br />''<br />''<br />''<br />