A housing society has constructed commercial plazas on the nullah which hampered natural flow of water, causing Wednesday’s urban flooding in E-11 in Islamabad. — Photo by Tanveer Shahzad ISLAMABAD: A private housing society in alleged connivance with Capital Development Authority (CDA) and Islamabad administration not only reduced the size of the natural stream in E-11/2 but also altered natural flow of the water way, which caused urban flooding after the heavy rain on Wednesday. Old satellite images taken in 2002 and in 2008 showed the zigzag nullah entering E-11. However, later on, in 2010-12, alignment of the nullah was made straight by the society in street number 2, where a mother and her child drowned when gushing water entered their basement.