Climate change is reshaping the geostrategic, operational, and tactical environments with significant implications for U.S. national security and defense. Increasing temperatures; changing precipitation  patterns;  and more frequent, intense, and unpredictable extreme weather conditions caused by climate change are  exacerbating existing risks and creating new security challenges for U.S. interests. The risks of climate change  to Department of Defense (DoD) strategies, plans, capabilities, missions, and equipment, as well as those of  U.S. allies and partners, are growing. Global efforts to address climate change – including actions to address  the causes as  well as the effects – will influence DoD strategic interests, relationships, competition, and  priorities. To train, fight, and win in this increasingly complex environment, DoD will consider the effects of  climate change at every level of the DoD enterprise.