This repository is grounded in hydrological analysis of hydro-climatic variability at continental scale. It contains the complete, deterministic Python workflow used to construct the Hydro-Fiscal Exposure Index (HFEI) for African countries over the period 2000–2023. The archive includes all scripts required to assemble hydro-climatic indicators, economic structure variables, and fiscal exposure metrics; apply rank-based normalization; construct the hydro-climatic pillar using principal component analysis; compute the composite HFEI; and generate all diagnostics and figures reported in the associated manuscript. The workflow is fully reproducible, file-driven, and does not redistribute proprietary or restricted raw data. Reproduction of results requires re-downloading source datasets from their respective public providers, as documented in the manuscript and Supplementary Materials. This software accompanies the manuscript:“A continental framework linking hydro-climatic variability and fiscal exposure in Africa (2000–2023)”.