Every winter, the cold climate almost freezes Himachal Pradesh's hydropower generation.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/himachal-hydropower-generation-hit-extreme-cold
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/pioneer-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/himachal-pradesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hydroelectricity
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electricity
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/satluj-jal-vidyut-nigam
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nathpa-jhakri-hp
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kinnaur