The risk of natural disaster has been the focus of public policies. They are based on the Federal Law 12.608 / 2012, establishing the National Policy on Protection and Civil Defense. The overall goal is to understand the public policy related to the risks of natural disasters in the city of Blumenau, by identifying the structure of a public body and its powers. It constitutes an exploratory and descriptive qualitative approach. The method is characterized by systemic method and indirect technical documentation. The research was done in three steps: data collection, tabulation of information, analysis and discussion of results. The results indicate that the Supplementary Law 870/2013 which defines the administrative structure of the public power of Blumenau, does not detail the powers to the municipal responsible body for risk management of natural disasters, precisely indicated in Federal Law 12.608 / 2012.