At 01:13, the river warning pinged Ana’s phone. She’s a shift nurse and volunteer responder. In the twin, water crept over a familiar footbridge – the one near her mother’s flat. “Show me the drill,” she whispered, already lacing shoes.
Spring storms can drown Eurida’s riverside in 90 minutes. Coordination can’t live in a binder.
How it Works: The twin ingests rainfall forecasts, river sensors and terrain models. HAL8122™ launches a night‑drill: closing floodgates, rerouting buses, activating cooling centres, and broadcasting multilingual evacuation guidance (spatial audio inside the twin; SMS on the street). After ENDEX, the agent compiles a CSRD‑ready evidence pack: response times, vulnerable‑resident reach rates, and before/after risk maps – ready for audit and learning.
Why it Matters: Agencies practice together – fire, transport, utilities – and learn what actions actually shrink damage windows. Ana’s mother gets a door‑knock from a neighbour thanks to a community cascade; later, insurers recognise the city’s risk discipline and premiums steady.
EU‑by‑Design: Data minimisation for household lists, documented lawful bases, accessible guidance (captions; color‑safe maps), and full auditability of model versions used in decisions. Preparedness becomes habit, not headline.