Lightning Safety: Statistics and the 30-30 Rule

Bright lightning bolts flash across a purple and pink night sky over a row of houses.

Quick Reference Annual U.S. lightning deaths: About 20 people. Undocumented injuries are likely several times the official ~300. Annual U.S. lightning flashes: About 25 million cloud-to-ground strikes. 30-30 Rule: If you see lightning and count to 30 before hearing thunder, the storm is within 6 miles. Go inside. Wait time: Stay indoors for at least

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