BackgroundPatient education is a professional obligation for all nurses. Public health messaging in emergency departments during disasters can help prevent further risk or illness for affected communities. In this study, Australian emergency nurse Key Informants share their perceptions and experiences of preventative messaging provided in their departments during disasters and the governance and processes in place to support this practice. MethodsThe qualitative phase of a mixed methods study, where semi structured interviews were utilised, and data analysed using a six step Thematic analysis. ResultsThree themes were identified: (1) Part of the Job; (2) It’s all in the delivery; and (3) Preparation is the key. These themes include concepts involving the confidence and competence of nurses providing messages, what, when and how messages are being given and how prepared both the department and staff are regarding patient education during disaster events. ConclusionsNurse confidence is a key factor in the delivery of preventative messages during disasters, potentially resulting from a lack of exposure, a junior workforce and minimal training. Leaders agree that departments are not preparing or supporting messaging practice, with an absence of specific training, formal guidelines, and patient education resources; and that improvement is needed.