This first TRANSCEND team field trip to Mumbai was my first time visiting Mumbai and even India. I was very overwhelmed by all the impressions, and – of course – with my background in hydrology, I was particularly captivated by the complexity of flood processes in this heterogeneous megacity. As the visit was outside the monsoon period and no inundation was witnessed by the TRANSCEND team, I had to analyse the processes by talking to locals and stakeholders. However, only walking through Mumbai's streets allowed for the impression that the city is full of contrasts and that this is mirrored in flooding processes on various scales. Types of physical urban form (i.e., “urban morphologies”) are already established as a research topic in the urban science community. While roaming through the streets of Mumbai the relevance of differentiation in urban morphologies became very visible.