Supplementary material: IFS-Municipal cascade model — calibration files, simulation code, and sector taxonomy

Supplementary material for "A cascade reliability model for systemic fragility assessment in Brazilian municipal infrastructure" (submitted to Natural Hazards, Springer, June 2026). Contains: cascade simulation code in Python (cascade.py), calibration JSON files for Fortaleza/CE (severe drought, 2016–17) and Recife/PE (extreme rainfall, May 2022), normative sector taxonomy, interactive HTML simulators (IFS-Sim and IFS-Post), and validation results. Code: MIT License. Data: CC BY 4.0 Submitted to Natural Hazards (Springer) — manuscript reference: NHAZ-D-26-02429 (June 2026).