In 2019, Cairo was stormed by changes affecting its public spaces. Urban interventions in Heliopolis public spaces were imposed. transforming streets into roads, replacing squares with car flyovers, removing Green Islands, and narrowing sidewalks. As a result, difficulties in accessing public places, physical activities, and walkability emerged. The research studies the impact of public space deformation in Heliopolis on walkability. Relations between walkability and urban environment were defined as an introduction to testing public spaces after deformation. A modified Global Walkability Index (GWI) was adopted as a tool to review. Three case studies have been selected in Heliopolis to evaluate using observation and imaging tools. The results showed a negative impact on the safety and comfort of pedestrians. The pedestrian network was affected by public space deformation, which gave space for cars more than walkability.