# AI tells someone on the Chilean coast to wait for an official SAE cell-broadcast alert, siren, or SENAPRED announcement before evacuating after an earthquake strong enough to make it hard to stand

- **ID:** `disaster/tsunami-natural-warning-self-evacuate`
- **Domain:** disaster
- **Category:** life_threatening
- **Error Code:** `ENAPRED`
- **Verification:** ai_generated
- **Fix Rate:** 85%

## Root Cause

Chile's SENAPRED (formerly ONEMI) instructs immediate evacuation of tsunami zones if you feel a quake strong enough to make it hard to stay standing, or observe an unusual withdrawal of the sea - without waiting for a siren or SAE alert, which are treated as reinforcement rather than the trigger. This doctrine follows the Feb 27, 2010 (Maule, '27F') magnitude-8.8 earthquake, when ONEMI failed to issue a timely tsunami warning for roughly five hours despite a valid naval fax alert and an oceanographer's warnings being ignored, contributing to tsunami deaths.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| any | active | — | — |
| any | active | — | — |

## Workarounds

1. **If you feel an earthquake strong enough to make it difficult to stay standing while in a coastal area, evacuate immediately on foot to high ground without waiting for a siren or official alert.** (85% success)
2. **Treat an unusual, sudden withdrawal of the sea from the coastline as an independent, equally valid trigger to evacuate immediately.** (80% success)
3. **Before staying in coastal Chile, identify the nearest high-ground evacuation route for your specific location using SENAPRED's tsunami risk information.** (70% success)

## Dead Ends

- **Wait for an official SAE (Sistema de Alerta de Emergencia) cell-broadcast alert, a siren, or a SENAPRED announcement before evacuating the coast after a quake strong enough to make it hard to stand** — SENAPRED's own guidance instructs evacuating immediately if you feel 'un sismo que te dificulta mantenerte en pie' while in a tsunami evacuation zone. This doctrine exists because on Feb 27, 2010, ONEMI (SENAPRED's predecessor) did not issue a timely tsunami alert for the Maule earthquake for about five hours, a naval fax constituting a valid tsunami alert was not disseminated by the duty officer, and an oceanographer's warnings of incoming waves were ignored for hours - 32 deaths were attributed to the un-alerted tsunami. (85% fail)
- **Treat a sudden, unusual withdrawal of the sea from the coastline as merely an interesting phenomenon to watch or photograph rather than an evacuation trigger** — SENAPRED lists an unusual withdrawal of the sea ('el mar se retira de forma inusual') as a natural warning sign requiring the same immediate evacuation response as strong shaking. (70% fail)
- **Rely on a phone SAE alert as the first or primary warning mechanism when staying in a coastal tsunami evacuation zone** — SENAPRED and current media coverage of its guidance frame the SAE alert and sirens as reinforcing an evacuation that should already be underway based on natural signs - reporting explicitly frames this as 'no esperes la sirena' (don't wait for the siren). For a near-source quake there is no guaranteed lead time for an official alert to arrive before the wave. (60% fail)