{
  "id": "safety/lightning-safety-crouch-myth",
  "signature": "AI tells someone caught in a thunderstorm outdoors to crouch low to the ground with feet together, or to lie flat, to avoid lightning strikes",
  "signature_zh": "AI告诉在雷暴中户外的人蹲低身体、双脚并拢，或平躺在地面上以避免雷击",
  "regex": "crouch low to the ground with feet together to avoid lightning|lie flat during a thunderstorm|lightning safety crouch",
  "domain": "safety",
  "category": "physical_safety",
  "subcategory": null,
  "root_cause": "The 'lightning crouch' (feet together, crouch low) was previously recommended by some safety organizations but has been deprecated because it provides negligible protection compared to moving to a substantial building or hard-topped vehicle; lying flat increases ground current exposure and is dangerous; the only effective mitigation is to get inside a safe structure as quickly as possible",
  "root_cause_type": "generic",
  "root_cause_zh": "'防雷蹲姿'（双脚并拢，蹲低身体）曾被一些安全组织推荐，但已被弃用，因为与进入坚固建筑物或硬顶车辆相比，它提供的保护微不足道；平躺会增加地面电流暴露，是危险的；唯一有效的缓解措施是尽快进入安全结构",
  "versions": [
    {
      "version": "NOAA Lightning Safety Guidelines 2023",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "NFPA 780 Standard for Lightning Protection 2023",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Crouch low with feet together to minimize height and step potential",
      "why_fails": "Crouching does not significantly reduce risk; step potential is a minor factor compared to direct strike; the primary danger is being the tallest object, which crouching does not solve",
      "fail_rate": 0.85,
      "condition": "",
      "sources": []
    },
    {
      "action": "Lie flat on the ground to present a lower profile",
      "why_fails": "Lying flat increases the area of contact with the ground, raising the risk of ground current injury; it also exposes more of the body to a direct strike",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Immediately move to a substantial building (with plumbing and wiring) or a hard-topped metal vehicle. If no shelter is available, avoid open fields, hilltops, and isolated trees. Crouching is a last resort only if you are in a group and cannot reach shelter, but it is not recommended as a primary strategy.",
      "success_rate": 0.95,
      "how": "Immediately move to a substantial building (with plumbing and wiring) or a hard-topped metal vehicle. If no shelter is available, avoid open fields, hilltops, and isolated trees. Crouching is a last resort only if you are in a group and cannot reach shelter, but it is not recommended as a primary strategy.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Follow the 30-30 rule: if time between seeing lightning and hearing thunder is less than 30 seconds, go indoors. Stay indoors for 30 minutes after the last thunderclap.",
      "success_rate": 0.9,
      "how": "Follow the 30-30 rule: if time between seeing lightning and hearing thunder is less than 30 seconds, go indoors. Stay indoors for 30 minutes after the last thunderclap.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "立即前往坚固建筑物（有管道和电线）或硬顶金属车辆。如果没有避难所，避免开阔地、山顶和孤立树木。只有在无法到达避难所且身处群体中时，蹲姿是最后手段，但不推荐作为主要策略。",
    "遵循30-30规则：如果看到闪电和听到雷声的时间间隔小于30秒，立即进入室内。在最后一次雷声后，在室内停留30分钟。"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.weather.gov/safety/lightning",
  "official_doc_section": null,
  "error_code": "LIGHTNING-SAFETY-002",
  "verification_tier": "ai_generated",
  "confidence": 0.92,
  "fix_success_rate": 0.95,
  "resolvable": "true",
  "first_seen": "2024-08-10",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}