Weather Safety What is the 30/30/30 rule for lightning? February 6, 2026 by Myaya | Leave a Comment The 30/30/30 rule for lightning is a safety guideline designed to help individuals determine when to seek shelter during a thunderstorm. It states that if the time between seeing lightning and hearing thunder is 30 seconds or less, you should find shelter immediately. After the storm, wait 30 minutes after the last lightning flash or […] Read more ยป