The "National Landslide Preparedness Act Reauthorization Act of 2025" aims to reauthorize and amend the National Landslide Preparedness Act. It adds definitions for atmospheric river and extreme precipitation events, expands the entities involved in the program, and includes the National Aeronautics and Space Administration in the coordinating committee. The bill also revises the National landslide hazards reduction program, emphasizing identification of at-risk areas, community preparedness, early warning systems, and grants. Additionally, it amends the 3D elevation program by expanding the coordinating committee and securing public funding until 2030. This legislation is focused on enhancing preparedness and support for landslide-related hazards and impacts.