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Lightning Safety

 

The odds of being struck by lightning in Canada are lower than one in a million. Yet each year, six to 12 Canadians are killed by lightning and many more are injured.

 

A lightning guideline is the "30-30" rule: (http://sirc.ca/resources/weather, SIRC and Environment Canada)

  • When you can count 30 seconds or less between lightning and thunder, head for safe shelter
  • Remain sheltered for 30 minutes after the last clap of thunder.

30 Seconds:

When there are fewer than 30 seconds between the flash of lightning and the rumble of thunder, you should seek immediate shelter in a well-constructed building. If no such building is nearby, then the best choice is to get into a hard-topped vehicle such as a car, van or RV. If you are caught outside and cannot quickly get to a building or vehicle, then you should do the following:

  •     Avoid being the tallest object around;
  •     Avoid being NEAR the tallest object around (i.e. an isolated tree);
  •     Avoid being near objects that conduct an electrical charge (metal fence, power lines, golf clubs, fishing rod, etc.);
  •     Get out of, or off, the water
30 Minutes:

Maintain lightning safety precautions for 30 minutes after the last flash of lightning or rumble of thunder. There have been a number of documented cases of lightning striking the ground many kilometres away from a thunderstorm, even though the storm may be moving away.

 

Canadian Lightning Danger Map - Ontario; Government of Canada 

 

Lightning Safety; Environment and Climate, Canada

 
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