We recommend the Director, Cybersecurity and Infrastructure Security Agency: Strengthen coordination with FEMA by establishing Memorandums of Understanding, Interagency Agreements, or other documented strategies to formally define CISA's and FEMA's roles and responsibilities for information sharing and analytical collaboration for grant decision-making related to safety, security, and resilience of dams, as well as the use and applicability of numerical simulation models, flood inundation tools, and supporting geospatial mapping capabilities to support emergency preparedness and incident response.