Adds new weather-related definitions to flood decision-support law and reauthorizes and expands the National Landslide Preparedness Act. The changes broaden who can participate and receive grants (including Tribal and Native Hawaiian organizations), add and clarify interagency roles (including NASA), require stronger planning/monitoring and regional partnerships (including Alaska), update the 3D elevation program, improve warning and emergency response activities, and direct $35 million from USGS amounts for implementation.

Overall, the bill strengthens federal support for landslide and flood readiness by improving definitions, expanding partnerships and eligible recipients, boosting mapping and monitoring capacity, and providing dedicated funding for hazard assessment, planning, and warning improvements.