Flashflood Hazard for Preparedness Planning in Rosenheim, Germany (2026-03-05)

Recurrent episodes of intense rainfall in the District of Rosenheim have generated flash‑flood conditions that exceed local preparedness capacity. The requesting authority seeks support to obtain a dedicated assessment for rainfall driven flash floods, complementing the existing riverine flood analyses. Historical records indicate short‑duration events with rapid onset, requiring the evaluation of multiple rainfall scenarios to capture both immediate and extended impacts. The activation requests hazard mapping of flood extents, water depths and flow velocities, together with an exposure assessment of key infrastructure. The objective is to provide actionable information to strengthen emergency planning and to identify areas and assets with elevated exposure to flash‑flood impacts and subsequent river‑overflow effects.