Abstract. This study examines the mechanisms of flood-risk precautionary behavior among Greek citizens. To that end, it specifies a comprehensive model in which risk perception and worry mediate the effects of awareness-raising factors and confidence attitudes on individuals' flood preparedness. Both the current preparedness and preparedness intention are assessed. Raw data were obtained via an online survey that received 1855 responses. Findings from SEM (structural equation modeling) analysis indicate that worry mediates the effects of awareness and confidence on preparedness; risk perception is limited to the activation of preparedness intention. The results also suggest that past risk perceptions might have affected prior preparedness motivations associated with current preparedness. Interestingly, citizens who had already undertaken preparedness measures in the past appear to be more willing to invest in new measures. Implications for improving flood risk management are discussed.