As you walk through a city – be it Hanoi, Houston or Hobart – it’s easy to fall into the trap of thinking our urban environments to be invulnerable.

Beautiful buildings and impressive infrastructure rise and evolve around us, and for most, cities are a representation of hope, possibility and opportunity. It’s our default to think of urban areas as living, breathing, self-sustaining organisms unto themselves, and in many ways they are. But as anyone who has fallen victim…