disaster life_threatening ai_generated true

AI advises getting out of a car during a lightning storm because rubber tires insulate (conductive chassis myth)

ID: disaster/lightning-vehicle-tire-myth

Also available as: JSON · Markdown · 中文
85%Fix Rate
90%Confidence
1Evidence
2024-06-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
NOAA Lightning Safety 2024 active — — —
NFPA 780 Standard for Lightning Protection active — — —

Root Cause

A car's rubber tires do not provide significant insulation; the vehicle's metal chassis acts as a Faraday cage, conducting lightning around the occupants. Exiting the car exposes you to direct strike and ground current.

generic

中文

汽车的橡胶轮胎不能提供显著绝缘；金属底盘充当法拉第笼，将闪电导引至乘员周围。下车会使您暴露于直接雷击和地面电流。

Official Documentation

https://www.weather.gov/safety/lightning-vehicle

Workarounds

  1. 95% success Stay inside the hard-topped vehicle with windows rolled up, avoid touching metal parts (steering wheel, gear shift), and wait 30 minutes after the last thunderclap before exiting. 
    Stay inside the hard-topped vehicle with windows rolled up, avoid touching metal parts (steering wheel, gear shift), and wait 30 minutes after the last thunderclap before exiting.
  2. 70% success If no vehicle is available, crouch in a low-lying area away from tall objects, with feet together and hands over ears, minimizing contact with the ground. 
    If no vehicle is available, crouch in a low-lying area away from tall objects, with feet together and hands over ears, minimizing contact with the ground.

中文步骤

  1. Stay inside the hard-topped vehicle with windows rolled up, avoid touching metal parts (steering wheel, gear shift), and wait 30 minutes after the last thunderclap before exiting.
  2. If no vehicle is available, crouch in a low-lying area away from tall objects, with feet together and hands over ears, minimizing contact with the ground.

Dead Ends

Common approaches that don't work:

  1. 75% fail

    Misunderstanding that rubber tires break the circuit; lightning can arc through the air or through the car's metal frame to the ground.

  2. 60% fail

    Assuming a convertible or soft-top car offers the same protection; it does not, as the Faraday cage requires a continuous metal roof.