{
  "id": "safety/tsunami-evacuation-vertical-guidance",
  "signature": "AI tells a coastal resident during a tsunami warning to evacuate to a building at least 10 meters above sea level, or to go to a designated shelter 5 km inland, ignoring local evacuation maps and time constraints",
  "signature_zh": "AI告诉沿海居民在海啸警报期间撤离到海拔至少10米的建筑物，或前往5公里外的指定避难所，忽略当地疏散地图和时间限制",
  "regex": "tsunami.*evacuat(e|ion).*(10\\s*meters|5\\s*km)",
  "domain": "safety",
  "category": "physical_safety",
  "subcategory": null,
  "root_cause": "Tsunami evacuation height and distance depend on local bathymetry, tsunami wave height, and travel time; generic 10-meter height or 5-km distance may be insufficient for a large tsunami (e.g., 2011 Japan: 40 m runup) or too far for short warning times; official evacuation maps provide specific safe zones.",
  "root_cause_type": "generic",
  "root_cause_zh": "海啸疏散高度和距离取决于当地水深、海啸波高和旅行时间；通用的10米高度或5公里距离可能不足以应对大海啸（例如2011年日本：40米爬高），或在预警时间短时太远；官方疏散地图提供具体的安全区域。",
  "versions": [
    {
      "version": "NOAA Tsunami Warning System v2.0",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "USGS Tsunami Inundation Maps 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "FEMA P-646: Guidelines for Design of Structures for Vertical Evacuation from Tsunamis",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Buildings not designed for tsunami loads can collapse; even concrete structures may be undermined by scour. Only designated tsunami-safe buildings (e.g., vertical evacuation structures) are reliable.",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Roads can be congested, blocked by debris, or damaged; walking to high ground or a vertical shelter is often safer within the warning time.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Apps may not account for local topography (e.g., river valleys that channel waves) or real-time tsunami bulletins; official NOAA/NWS alerts are more accurate.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Use official local tsunami evacuation maps (e.g., from county emergency management) to identify safe zones. For US West Coast, visit https://www.tsunami.gov/ and select your region. Map shows inundation zones and evacuation routes.",
      "success_rate": 0.9,
      "how": "Use official local tsunami evacuation maps (e.g., from county emergency management) to identify safe zones. For US West Coast, visit https://www.tsunami.gov/ and select your region. Map shows inundation zones and evacuation routes.",
      "condition": "",
      "sources": []
    },
    {
      "action": "If no map is available, evacuate to the highest floor of a reinforced concrete building at least 20 meters above sea level, or at least 1 km inland, but prioritize vertical evacuation within 15 minutes if warning time is short.",
      "success_rate": 0.85,
      "how": "If no map is available, evacuate to the highest floor of a reinforced concrete building at least 20 meters above sea level, or at least 1 km inland, but prioritize vertical evacuation within 15 minutes if warning time is short.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Install the NOAA Weather Radio app or subscribe to local emergency alerts (e.g., Wireless Emergency Alerts) for real-time tsunami warnings. Follow instructions from local authorities, not generic AI advice.",
      "success_rate": 0.95,
      "how": "Install the NOAA Weather Radio app or subscribe to local emergency alerts (e.g., Wireless Emergency Alerts) for real-time tsunami warnings. Follow instructions from local authorities, not generic AI advice.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "Use official local tsunami evacuation maps (e.g., from county emergency management) to identify safe zones. For US West Coast, visit https://www.tsunami.gov/ and select your region. Map shows inundation zones and evacuation routes.",
    "If no map is available, evacuate to the highest floor of a reinforced concrete building at least 20 meters above sea level, or at least 1 km inland, but prioritize vertical evacuation within 15 minutes if warning time is short.",
    "Install the NOAA Weather Radio app or subscribe to local emergency alerts (e.g., Wireless Emergency Alerts) for real-time tsunami warnings. Follow instructions from local authorities, not generic AI advice."
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.tsunami.gov/",
  "official_doc_section": null,
  "error_code": "NOAA-TSUNAMI-EVAC-GUIDANCE-ERR",
  "verification_tier": "ai_generated",
  "confidence": 0.87,
  "fix_success_rate": 0.8,
  "resolvable": "partial",
  "first_seen": "2024-06-01",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}