Lightning Guides
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The 30-Minute Lightning Rule: How Long to Wait After Thunder
Why you should wait 30 minutes after the last thunder before going back outside, why the clock restarts, and how it applies to sport, swimming and work.
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Lightning Safety: What to Do Before, During and After a Storm
How to stay safe from lightning, based on US National Weather Service and UK Met Office advice: safe shelter, the 30-minute rule and what to do outdoors.