The Biden-Harris administration’s discussion of climate change is analyzed during the transformative time of the administration’s first hundred days in office. The theoretical framework of the Copenhagen School of Security Studies (CS) is used to develop the coding frame to perform a qualitative content analysis of empirical material consisting of speeches and other documents of the administration. Several securitization moves have been identified and climate change has been presented as a security issue and an existential threat by the Biden- Harris administration. A wide range of referent objects are identified, which is the people and things presented to be threatened by climate change. The whole world, ecosystems, the American people and future generations are a few of the identified referent objects. International and national solutions are presented, though the solutions are not interpreted as extreme measures as discussed by the CS. Therefore, this study supports the critique of a too narrow definition of securitization by the CS.