EHS Safety Training Home Page
   

Watch

Shelters

30-30 Rule

Outdoors

Indoors

Computers

Injuries

Overview

Quiz

Back to Modules


Lightning--The Underrated Killer

lightning

In the United States, there are an estimated 25 million lightning flashes each year.  Over the past 30 years, lightning has killed an average of 65 people each year. While documented lightning injuries in the United States average about 300 per year, undocumented injuries are likely much higher.

  • Watch for Developing Thunderstorms:  Clouds that grow vertically into towering cumulus clouds are often the first sign of a developing thunderstorm.
  • When to Seek Safe Shelter: Lightning can strike as far as 10 miles from the area where it is raining.  That's about the distance you can hear thunder.  If you can hear thunder, you are within striking distance--seek safe shelter immediately.
  • Use the 30-30 Rule:  When you see lightning, count the seconds until you hear thunder.  If that time is 30 seconds or less, the storm is within 6 miles and is dangerous.  Seek shelter immediately.  Wait at least 30 minutes after the last clap of thunder before leaving shelter.  Don't be fooled by sunshine or blue sky!
  • Outdoors:  Stop any organized outdoor sporting activity at the first roar of thunder to ensure everyone has time to get to a large building or enclosed vehicle.  Follow the 30-30 Rule.
  • Indoors:  Stay off corded phones, computers and other electrical equipment that put you in direct contact with electricity.  Buy ground fault protectors (better: unplug sensitive equipment).  Stay away from metal plumbing fixtures and running water.  Follow the 30-30 Rule.
  • Helping a Lightning Strike Victim:  Call 911 immediately and start CPR if necessary.  Cardiac arrest and heart irregularities, burns and nerve damage are common injuries.  With proper treatment, most victims survive.  You are in no danger helping a lightning victim.  The charge will not affect you.
  • Summary:  With common sense, you can greatly increase your safety and the safety of those you are with.  Remember the 30-30 Rule.

Next: Quiz

Check out the Severe Weather Links for additional information.

 

 

  contact: EHS Webmaster