Earth Observation (EO) data offers critical insights for disaster risk management, but its effective use at the local level is often hindered by fragmentation in formats, metadata standards, and integration practices. This question explores what technical, legal, and semantic protocols are needed to harmonize EO data from different sources—satellite, aerial, UAV, and in-situ sensors—for use in localized disaster planning and early warning systems. Expert input is encouraged on best practices for data fusion, open-access frameworks, interoperability with national geospatial infrastructures, and alignment with Sendai Framework indicators and anticipatory action workflows.