SIATA Early Warning Network
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
How this atlas is made · What “last verified” means · What “source-checked” means
Its community alert calls emptied a neighbourhood before a creek rose overnight in March 2022. In January 2023 the same network's cameras filmed a fatal flash flood in real time, at an underpass nobody closed.
what does this mean?
The strongest source is press reporting; no primary evaluation was located. It grades who did the looking — not how well the project went. All four grades →Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 9 more in Medellín · 📡 Sensors & IoT guide · 🌱 Environment projects
SIATA, a regional early-warning network for the ten-municipality Valle de Aburrá, has monitored rainfall, river levels, landslide risk and air quality since 2010. Universidad EAFIT operates roughly 1,200 sensors, radars and cameras under contract with the metropolitan authority. Community alert calls have prompted real evacuations, though systemwide lives-saved figures remain unverified.
📊 Impact
In March 2022, SIATA's community alert-call network prompted residents of Medellín's El Pesebre neighborhood to evacuate as Quebrada La Iguaná rose overnight; no independent, systemwide count of alerts issued or lives saved exists.
🎓 Lesson
Sensors detecting a hazard is not the same as an agency acting on it — in January 2023 SIATA's cameras captured a fatal flash flood in real time at an underpass that was never closed.
Sources
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Compare this project
When the river rises: what is the reading allowed to do?
Four flood systems, four answers to the question that organises much of this atlas — whether a measurement triggers anything. The ladder runs from a reading that acts entirely by itself down to a network that watches everything and decides nothing.
| Project | Since | Status | Outcome | Evidence | Run by | Cost | What the reading may do |
|---|---|---|---|---|---|---|---|
| Tsunami-Alert Automatic Tide Gate ClosureOsaka, 🇯🇵 | 2018 | Live | Ongoing | Official | Regional government | not public | The reading acts by itself: the tide gates close automatically on the national alert, with no human in the loop. |
| Bangkok Flood Control Centre: Drainage Telemetry & Street-Level ForecastingBangkok, 🇹🇭 | 2021 | Live | Ongoing | Official | City government, Utility or public operator | not public | Staff decide with the data: radars and level sensors feed a control centre staffed around the clock, and crews operate the pumps. |
| Busan Urban Flood Warning System (Busan Safety ON)Busan, 🇰🇷 | 2023 | Live | Ongoing | Official | City government | not public | Warning only: the portal shows risk and alerts residents, and the city itself cautioned at launch that the readings could be wrong. |
| SIATA Early Warning NetworkMedellín, 🇨🇴 | 2010 | Live | Ongoing | Media | Research institution | not public | A research-run regional network that watches everything — including, once, a fatal flash flood in real time that no agency acted on. |
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📎 Cite this project
1001 Smart Cities (2026). “SIATA Early Warning Network” — Medellín, Colombia. The Smart City Atlas. https://1001smartcities.org/projects/medellin-siata-early-warning/ (last verified 2026-07-30). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.