BAHAWALPUR: The sizzling heat, which has been gripping the Cholistan desert for the previous one month, has caused an acute water shortage for the desert areas residents and their livestock, as around one-third of the water ponds in the area have gone dry. Dawn has learnt that around one-third of the 2,000 open ponds, locally called ‘toba’, which are the main source of drinking water, besides very few water supply lines in some of the desert areas, for the locals and their livestock, have dried up, causing an acute water shortage in Cholistan. According to experts, during the hot months in the desert areas, the high water evaporation rate, caused bythe scorching sunlight and high temperatures, turns these open ponds dry.