During stormy summer days, be prepared to follow the 30-30 rule.
Seek shelter immediately if you see lightning then hear thunder within 30 seconds. Do not resume an outdoor activity such as swimming, playing ball, golfing, boating, or fishing until 30 minutes after you have heard the last audible thunder clap, not once the rain has stopped.

Just because it is not raining where you are, does not mean that a storm is too far away to be dangerous. Lightning strikes have been recorded as far as 20 miles away from the area where rain is actually falling!

If you plan to be at an outdoor activity, check the weather report before leaving home. Have a plan for what to do if the weather should suddenly turn bad. Know where you can find shelter, and do not wait too long before going there. Never seek shelter under a tree. For safety's sake, follow the 30 - 30 rule!

For more information about lightning safety go to - http://www.srh.noaa.gov/mlb/ltgcenter/ltgsafety.html