- Get into a fully enclosed building or hardtop vehicle at the first rumble of thunder.
- Stay indoors for 30 minutes after the last thunder clap.
- Monitor the weather forecast and have a plan for getting to safety in case of a thunderstorm.
- Do not use a corded phone during a thunderstorm unless it is an emergency; cell phones are safe.
- Keep away from plumbing, electrical equipment and wiring during a thunderstorm.
Current Level (in milliamperes) Probable effect on human body
- 1 mA Perception level. Slight tingling sensation. Still dangerous under certain conditions.
- 5 mA Slight shock felt; not painful but disturbing. Average individual can let go. However, strong involuntary reactions to shocks in this range may lead to injuries.
- 6-30 mA Painful shock, muscular control is lost. This is called the freezing current or “let-go” range.
- 50-150 mA Extreme pain, respiratory arrest, severe muscular contractions. Individual cannot let go. Death is possible.
- 1000-4300 mA Ventricular fibrillation (the rhythmic pumping action of the heart ceases). Muscular contraction and nerve damage occur. Death is most likely.
- 10,000 mA Cardiac arrest, severe burns and probable death.