The unprecedented floods of 2011 in Thailand have led to much greater awareness of the need for flood disaster preparedness in the public health workforce. The floods had widespread impacts on the society, the economy, the natural environment and, notably, on human health. Flooding transformed the every aspect of people’s living conditions. Apart from mortality and direct injuries the floods led to a lack of food and clean drinking water, problems disposing of sewage and solid waste, poisonings from the venomous water snakes, and vector-borne and other forms of infectious diseases. Flooding had impacted on mental health as both a direct effect of traumatic events and less directly through the personal disruption, stress and a breakdown in sources of social support in the weak following the start of the crisis (Pinyaphong, 2008; Department of Communicable Disease Control, 2011; Du et al., 2010, cited in Wichaidit & SornSriwichai, 2012). Furthermore, flooding disrupted access to health care services through breakdowns in the transport, power and supply chain infra-structure. Patients with continuing and long-term care needs were particularly affected.