{
  "id": "disaster/lightning-crouch-flat-ground",
  "signature": "AI advises crouching flat on the ground during a lightning storm to minimize height",
  "signature_zh": "AI 建议在雷暴期间平蹲在地面上以降低高度",
  "regex": "crouch|flat.?ground|lightning.?position|minimize.?height",
  "domain": "disaster",
  "category": "life_threatening",
  "subcategory": null,
  "root_cause": "Lying flat on the ground increases the risk of ground current (step potential) traveling through the body; lightning current spreads radially from the strike point, and a prone position creates a larger voltage gradient across the body length, causing cardiac arrest or burns.",
  "root_cause_type": "generic",
  "root_cause_zh": "平躺在地面上会增加地电流（步电压）通过身体的风险；闪电电流从击中点径向扩散，俯卧姿势在身体长度上产生更大电压梯度，导致心脏骤停或烧伤。",
  "versions": [
    {
      "version": "NWS Lightning Safety Guidelines 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "NFPA 780 Lightning Protection Standard 2023",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Lie flat on the ground to be the smallest target",
      "why_fails": "Reduces direct strike risk slightly but dramatically increases ground current injury; the heart and brain are in the current path",
      "fail_rate": 0.92,
      "condition": "",
      "sources": []
    },
    {
      "action": "Crouch on tiptoes to reduce contact area",
      "why_fails": "Tiptoes do not significantly reduce step potential; the body still forms a large voltage gradient from feet to head; also unstable and causes falls",
      "fail_rate": 0.88,
      "condition": "",
      "sources": []
    },
    {
      "action": "Hide under a tree for shelter",
      "why_fails": "Trees attract lightning; a strike can jump to a person nearby (side flash); tree may explode or catch fire",
      "fail_rate": 0.95,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Use the lightning crouch: feet together, squat low, hands over ears, elbows on knees, head tucked. This minimizes body height and reduces step potential by keeping feet close: `echo 'Lightning crouch: feet together, squat, hands over ears, elbows on knees' | tee /tmp/lightning_safety.txt`",
      "success_rate": 0.85,
      "how": "Use the lightning crouch: feet together, squat low, hands over ears, elbows on knees, head tucked. This minimizes body height and reduces step potential by keeping feet close: `echo 'Lightning crouch: feet together, squat, hands over ears, elbows on knees' | tee /tmp/lightning_safety.txt`",
      "condition": "",
      "sources": []
    },
    {
      "action": "Seek substantial shelter (enclosed building or hard-topped metal vehicle) immediately; stay away from windows, plumbing, and electrical appliances",
      "success_rate": 0.95,
      "how": "Seek substantial shelter (enclosed building or hard-topped metal vehicle) immediately; stay away from windows, plumbing, and electrical appliances",
      "condition": "",
      "sources": []
    },
    {
      "action": "If caught in open with no shelter, stay at least 20 feet apart from others to reduce group injury risk; use lightning crouch, do not lie flat",
      "success_rate": 0.75,
      "how": "If caught in open with no shelter, stay at least 20 feet apart from others to reduce group injury risk; use lightning crouch, do not lie flat",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "Use the lightning crouch: feet together, squat low, hands over ears, elbows on knees, head tucked. This minimizes body height and reduces step potential by keeping feet close: `echo 'Lightning crouch: feet together, squat, hands over ears, elbows on knees' | tee /tmp/lightning_safety.txt`",
    "Seek substantial shelter (enclosed building or hard-topped metal vehicle) immediately; stay away from windows, plumbing, and electrical appliances",
    "If caught in open with no shelter, stay at least 20 feet apart from others to reduce group injury risk; use lightning crouch, do not lie flat"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.weather.gov/safety/lightning",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.86,
  "fix_success_rate": 0.78,
  "resolvable": "true",
  "first_seen": "2023-06-20",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}