A billion-year-old terrain, a 25-year-old master plan and decades of urbanisation later, the city’s IT corridor still dreads the rain. On June 9, a brief but intense downpour exposed the fault lines beneath Cyberabad’s gleaming skyline, trapping more than three lakh vehicles in a massive gridlock and raising fresh questions about drainage, planning and infrastructure. Serish Nanisetti, Siddharth Kumar Singh and Lavpreet Kaur decode why Cyberabad remains so vulnerable to flooding