# AI 建议在雷暴期间平蹲在地面上以降低高度

- **ID:** `disaster/lightning-crouch-flat-ground`
- **领域:** disaster
- **类别:** life_threatening
- **验证级别:** ai_generated
- **修复率:** 78%

## 根因

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。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| NWS Lightning Safety Guidelines 2024 | active | — | — |
| NFPA 780 Lightning Protection Standard 2023 | active | — | — |

## 解决方案

1. ```
   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`
   ```
2. ```
   Seek substantial shelter (enclosed building or hard-topped metal vehicle) immediately; stay away from windows, plumbing, and electrical appliances
   ```
3. ```
   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
   ```

## 无效尝试

- **Lie flat on the ground to be the smallest target** — Reduces direct strike risk slightly but dramatically increases ground current injury; the heart and brain are in the current path (92% 失败率)
- **Crouch on tiptoes to reduce contact area** — Tiptoes do not significantly reduce step potential; the body still forms a large voltage gradient from feet to head; also unstable and causes falls (88% 失败率)
- **Hide under a tree for shelter** — Trees attract lightning; a strike can jump to a person nearby (side flash); tree may explode or catch fire (95% 失败率)