Protecting citizens is one of the key factors and also a priority for governments, majors and policy makers in current (and future) smart cities. In this sense, cities and countries’ authorities are making a great effort in applying innovative approaches and new technologies in the Public Safety domain in recent years. One of these innovative approaches is to move the advanced safety to the Cloud. This short paper presents an introduction to how cloud hosting can be used by three of the most vital technological fields: Video Analytics, Semantics Data-mining and Communication Security. Part of the results and analysis produced in this paper are the outcome of the work carried out in the FP7 EU project SafeCity, one of the eight Use Cases of the FI Programme.