Thunderstorm and Lightning Safety

Lightning Safety Rules

• Stay away from doors, windows and metal indoor fixtures and electrical devices. 
• Stay off the telephone. 
• Avoid water.
• Avoid open high ground and isolated large trees. 
• When outdoors, use the 30-30 rule.

National Weather Service Thunderstorm and Lightning Safety Publication

Quick Reference for Thunderstorm and Lightning Safety

Are You Ready for a Thunderstorm ?

FEMA Fact Sheet: Thunderstorms and Lightning

30-30 Rule

Is there a threat of lightning in your area ?

30 seconds:
Count the seconds between seeing the lightning and hearing the thunder. If this time is 30 seconds or less then the lightning is close enough to be a threat. Seek shelter immediately.

30 minutes:
After seeing the last lightning flash, wait 30 minutes before leaving shelter. More than half of lightning deaths occur after the storm has passed. Stay in safe shelter until the threat has passed.