The Paris Agreement (COP 21) indicates an effort of nations towards the creation of a worldwide mechanism to control climate. Estimated to enter into force in 2020, the Agreement recognizes that countries may be affected not only by climate changes, but also by the impact of the actions taken in response to those changes. The objectives of this paper are: to excite the discussion about securitization of climate change, discussing its relation with disasters and conflicts; and to identify items which have constructed the current status of climate change in political and security agendas, highlighting the contribution of COP 21. For that purpose, a corpus formed by 51 items, produced between the beginning of the Cold War (1945) and July 2016, has been examined according to the analysis units proposed by the Copenhagen School, mainstream for this research. The results obtained indicate: (i) construction of climate change as a threat to international security (linked to conflicts and disasters); (ii) building of financial mechanisms, among others, to align the conduct of countries in a political agenda; and (iii) increase of military sector participation in the debate about climate change and preparation for increased action in disasters. This study makes two contributions to the existing literature. First, it provides a framework of items which clarify the securitization process of climate change and its relation with security, disasters and the armed forces. Second, through this analysis, it underlines the inclusion of the military sector in the relation between climate change, security and disasters.