Use the 30-30 rule to determine the threat of lightning in your area. Clear the field if conditions are unsafe. Under no circumstances should you try to ‘get the game in’ unless the 30-30 guidelines are followed.

30 seconds: Count the seconds between seeing lightning and hearing thunder.  If this time is less than 30 seconds, lightning is still a potential threat. Seek shelter immediately.

30 minutes:  After the last lightning flash, wait 30 minutes before leaving shelter. Half of all lightning deaths occur after a storm passes. Stay in a safe area until you are sure the threat has passed.