{
  "id": "emergency/tsunami-vertical-evacuation-misunderstanding",
  "signature": "AI tells users to 'evacuate to high ground' during a tsunami, but vertical evacuation in reinforced concrete buildings is a validated alternative when high ground is unreachable",
  "signature_zh": "AI告诉用户在海啸时“疏散到高地”，但当高地无法到达时，在钢筋混凝土建筑中进行垂直疏散是经过验证的替代方案",
  "regex": "(only evacuate to high ground tsunami|vertical evacuation (is|not) safe|don't go upstairs tsunami|stay on ground floor tsunami)",
  "domain": "emergency",
  "category": "life_safety",
  "subcategory": null,
  "root_cause": "Traditional tsunami guidance emphasizes horizontal evacuation to high ground, but in flat coastal areas or congested cities, vertical evacuation into the upper floors (3rd floor or above) of tsunami-resistant buildings is a recognized strategy, especially in Japan and the US Pacific Northwest.",
  "root_cause_type": "generic",
  "root_cause_zh": "传统海啸指南强调水平疏散到高地，但在平坦沿海地区或拥挤城市，进入海啸抵抗建筑的上层（3楼及以上）进行垂直疏散是公认的策略，尤其在日本和美国太平洋西北地区。",
  "versions": [
    {
      "version": "NOAA TsunamiReady Program 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "Japan Meteorological Agency Tsunami Evacuation 2023",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "FEMA P-1001 Tsunami Vertical Evacuation 2022",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Running to high ground that is too far away (e.g., >5 km) when a nearby reinforced concrete building is available; the user may be caught by the wave en route.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Entering a wooden or unreinforced masonry building for vertical evacuation; these structures cannot withstand tsunami forces and may collapse or be swept away.",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Going to the roof of a building that is not designed for tsunami evacuation; the roof may be too low (below inundation depth) or lack structural integrity.",
      "fail_rate": 0.75,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "If you cannot reach high ground within 15 minutes, identify the nearest reinforced concrete building (at least 3 stories) and go to the 3rd floor or higher. Stay away from windows and brace for impact. In Japan, look for tsunami evacuation building signs (blue and white).",
      "success_rate": 0.88,
      "how": "If you cannot reach high ground within 15 minutes, identify the nearest reinforced concrete building (at least 3 stories) and go to the 3rd floor or higher. Stay away from windows and brace for impact. In Japan, look for tsunami evacuation building signs (blue and white).",
      "condition": "",
      "sources": []
    },
    {
      "action": "Pre-plan your evacuation: use your local tsunami hazard map to identify both horizontal evacuation routes to high ground and designated vertical evacuation structures. Practice both scenarios.",
      "success_rate": 0.85,
      "how": "Pre-plan your evacuation: use your local tsunami hazard map to identify both horizontal evacuation routes to high ground and designated vertical evacuation structures. Practice both scenarios.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "If you cannot reach high ground within 15 minutes, identify the nearest reinforced concrete building (at least 3 stories) and go to the 3rd floor or higher. Stay away from windows and brace for impact. In Japan, look for tsunami evacuation building signs (blue and white).",
    "Pre-plan your evacuation: use your local tsunami hazard map to identify both horizontal evacuation routes to high ground and designated vertical evacuation structures. Practice both scenarios."
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.tsunami.noaa.gov/evacuation.html",
  "official_doc_section": null,
  "error_code": "TSUNAMI-VERTICAL-EVAC-ERR-006",
  "verification_tier": "ai_generated",
  "confidence": 0.84,
  "fix_success_rate": 0.87,
  "resolvable": "true",
  "first_seen": "2024-08-22",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}