How close does lightning need to be before I should worry?

If the gap between lightning and thunder is thirty seconds or less, the storm is close enough to strike you. At this point, get to proper shelter immediately or assume the lightning position if you're caught in the open.

Should I lie flat on the ground during a lightning storm?

No, lying flat is actually dangerous because it maximises your contact with the ground and exposes you to ground current, which causes most lightning injuries. Instead, crouch on the balls of your feet with your feet touching.

Do I need to throw away my metal gear during a thunderstorm?

Not really. Metal objects don't attract lightning—height and position do. Just avoid holding metal objects like walking poles upright, and remove metal-framed rucksacks if you're crouching on them for insulation.

Common Hazards

The Lightning Position Problem: What to Actually Do When Thunder Counts Down

Standing under a tree is dangerous. Lying flat is dangerous. Sheltering in a shallow cave is dangerous. The safest position involves squatting on insulation while minimising ground contact, and most people get it wrong because it feels absurd.

21 August 20269 min read