Biting cold conditions continued unabated in Himachal Pradesh even as the state witnessed a clear day on Sunday.
Mercury in tribal areas and higher hills stayed 15 to 20 degrees below freezing point while Keylong, Manali and Kalpa recorded a low of minus 7 degrees, minus 3 degrees and minus 1.6 degrees Celsius.
The minimum temperature hovered around freezing point in mid hills and Bhuntar recorded a low of 2 degrees, followed by Chamba 2. 2 degrees, Solan and Sundernagar 2.6 degrees, Una 3.2 degrees, Nahan 4.6 degrees, Dharamsala 4.8 degrees and Shimla 5.3 degree Celsius.
The maximum temperatures fluctuated marginally. Solan was hottest during the day with a high of 19.5 degrees, followed by Sundernagar 18.8 degrees, Nahan 17.5 degrees, Una 15 degrees, Dharamshala 14.2 degrees, Shimla and Bhuntar 14 degrees and Kalpa 5 degrees C.
All lakes and other natural sources of water like springs, rivulets and tributaries of major rivers remain frozen in high altitude areas, causing sharp reduction in discharge of water in snow-fed Sutlej, Beas and Ravi rivers.
Meanwhile, authorities have managed to partially restore water supply in Kullu and Manali areas even as power supply remain erratic.
The Border Roads Organisation opened the Manali-Keylong National Highway at Rohtang Pass and efforts are on to clear the roads in the interior areas of Kullu.
About 150 labourers stranded in under-construction Rohtang Tunnel were rescued and airlifted to Bhuntar. The work at the tunnel has been suspended for the winters, R S Rao, Executive Engineer of the Tunnel Project said.
The local MeT office has predicted rains or snow at isolated places over next 72 hours and warned of heavy rains or snowfall in some areas tomorrow.