Water is a basic source for sustaining our life and environment. Rainwater harvesting has been adopted for a long time and has given a positive impact on our life, agriculture as well as economy. Pressure on water resources will be intensified by climate change. Scarcity of water in Pakistan is a major problem now days for the people. Water from the ground is mostly used in all rural and urban areas of Pakistan; this is a possible reason behind declining of groundwater day by day. RWH technique has been implemented slowly by Pakistani population. Rainwater can be easily collected by using existing structures such as large-sized rooftops, playgrounds, ponds and parks. The Rainwater harvesting practice is quite clean and quality of rainwater compare to groundwater is strongly preferable for many domestic purposes. In this present study, the RWH capability of Engro Limited Fertilizer is calculated for rooftops of warehouses with the help of using ‘‘Google Earth Pro’’ and ‘‘ArcGIS 10.8’’. With an average quantity of annual rainfall in Nawabshah city i.e. 194.855 mm (7.671 inches) within the period (2010 to 2021). Nawabshah is the most suitable city for the practice of rainwater harvesting. The estimated quantity of runoff from rooftops of warehouses of Engro Limited Fertilizer comes out to be 2055466 liters. It is inferred that RWH is the best practical strategy to deflect the present and future water disasters in Pakistan.