The key tourist resort of Manali recorded a low of minus 1 degree Celsius while mercury hovered around freezing point at Bhuntar which recorded minimum temperature at minus 0.2 degree, followed by Chamba and Sundernagar 1.1 degree.
Solan experienced the coldest night of the season with minimum temperature at 1.4 degree, two degree below normal while Una and Nahan recorded minimum temperatures at 2.8 degree and 4.9 degree.
Palampur, Dharamsala and Shimla recorded low of 5.7 degree, 6.8 degree and 9.7 degree C, respectively.
All natural sources of water like lakes, springs, rivulets, tributaries and 70-km stretch of Chandrabhaga river were frozen for past three weeks, causing sharp fall in discharge of water in snow-fed Sutlej, Beas and Ravi Rivers.
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Consequently, the hydropower generation has been reduced by 25 per cent of the installed capacity in all the projects in the state.
Sundernagar was hottest in the region with maximum temperature at 22.8 degree while Kangra, Solan and Una recorded a high of 21.6 degree, followed by Bhuntar 20.6 degree, Shimla 20.4 degree, Dharamsala 17.4 degree, Nahan 17.1 degree and Kalpa 13.8 degree Celsius.