The goal of the final evaluation of the Department of Defense Climate Assessment Tool (DCAT) was to assess how the tool’s output could best be used to inform high-level mitigation planning and infrastructure development. The evaluation also identified areas of potential tool enhancement and new investment areas for future research. We found that the DCAT webtool provides a consistent way to produce exposure assessments at the installation or regional level. However, there are a few caveats to the use of DCAT outputs.