This research aims to explain the roles of public sectors to protect cities from disasters within the framework of location theory. The paper introduces a new term ‘attained safety,’ that is, safety as a result of government investment. The following three types of attained safety can be said to exist: (i) invariant within a city, (ii) mono-centered in a city, and (iii) scattered throughout a city. The benefits of (i) are constant throughout a city, while (ii) and (iii) increase as households live closer to the facilities. There are two research questions. The first is how attained safety can be introduced into the location theory of urban economics, and the second is whether the model with attained safety performs as well as the general land use model of urban economics. The land use model with attained safety presents equilibria with each type of safety, and also meets the Samuelson condition for a spatial case, the first and second theorems of welfare economics.