# AI tells coastal residents to 'evacuate to high ground' during a tsunami, but vertical evacuation in reinforced concrete buildings (above 3rd floor) is a valid alternative if high ground is far away

- **ID:** `emergency/tsunami-vertical-evacuation-misconception`
- **Domain:** emergency
- **Category:** life_safety
- **Error Code:** `TSUNAMI-EVAC-ERR-006`
- **Verification:** ai_generated
- **Fix Rate:** 82%

## Root Cause

The AI omits vertical evacuation as a recognized strategy for tsunamis when horizontal evacuation is impossible; many coastal areas have designated vertical evacuation structures, and climbing to 3rd+ floor of a reinforced concrete building can save lives

## Workarounds

1. **If unable to reach high ground within the evacuation time (typically 15-30 minutes after earthquake), move to the 3rd floor or higher of a reinforced concrete building. Avoid wood-frame structures. Stay away from windows and move to the side facing away from the ocean** (82% success)
   ```
   If unable to reach high ground within the evacuation time (typically 15-30 minutes after earthquake), move to the 3rd floor or higher of a reinforced concrete building. Avoid wood-frame structures. Stay away from windows and move to the side facing away from the ocean
   ```
2. **Identify pre-designated vertical evacuation structures in your area (e.g., tsunami-safe buildings marked with signs). Practice drills to reach these within 5 minutes of shaking stopping** (78% success)
   ```
   Identify pre-designated vertical evacuation structures in your area (e.g., tsunami-safe buildings marked with signs). Practice drills to reach these within 5 minutes of shaking stopping
   ```

## Dead Ends

- **** — In many coastal cities, high ground is kilometers away; traffic jams or blocked roads make it impossible. Vertical evacuation is faster and safer (90% fail)
- **** — Trees are not structurally sound against tsunami debris and wave force; only reinforced concrete buildings with deep foundations are safe (95% fail)
- **** — Ground floors are inundated by tsunami flow; water velocity can exceed 30 mph, causing drowning and debris impact. Vertical evacuation to 3rd+ floor is necessary (85% fail)