In a world of networked urbanism, where people affected by disaster connect intensively with each other, the media and emergency agencies, why do warnings go amiss? Why does knowledge of risk not translate into preparedness? Why are the mobilities of information so poorly understood? In this chapter, we build on a synthesis of insights from disaster management, policy, mobilities and design research, and science and technology studies (STS) to study how these disaster-related networked mobilities create complex landscapes of communication, interdependence and responsibility that are difficult to translate into preparedness. Our analysis informs, and is informed by, research collaborations with emergency responders, engineers and technology designers with the aim of understanding and developing social and digital technologies for collaboration. By bringing attention to new networked partnerships, we aim to provide a set of critical tools with which to consider practices of risk governance as an example of networked urbanism.