Zanskar is a high altitude semi-desert lying on the Northern flank of the Great Himalayan Range. This mountain range acts as a climatic barrier protecting Ladakh and Zanskar from most of the monsoon, resulting in a pleasantly warm and dry climate in the summer. Precipitations during this season are thus scarce, although it seems that the last decades have seen an increase in pluviometry. We have indeed noticed several water driven mills, that were built, during ancient periods of drought at a great distance from the villages, but are now abandoned because running water is now available nearer to the houses. The Zanskari houses, which are otherwise especially well built, are not adapted to the recently increasing rainfalls as their roofs pretty fast start to leak, which catches their surprised inhabitants unprepared. Most of the precipitations occur as snowfalls during the harsh and extremely long lasting winter period. These winter snow falls are of vital importance since they feed the glaciers which will melt in the summer and provide most of the irrigation water.