Lightning Safety Toolbox Talk
What's Inside the Full Packet
- Why This Topic Matters2
- Talk Outline2
- Presenter Script3
- Discussion Questions3
- Frequently Asked Questions4
- Related Talks & Complete Training5
- Crew Handout6
- Sign-In Sheet7
Why This Topic Matters
Construction crews work outdoors, often at height, around metal, and on open ground — exactly where lightning is most dangerous. Lightning can strike miles ahead of a storm, well before the rain arrives, and many strikes happen to people who waited too long to take cover or went back out too soon.
There is no safe place outdoors during a thunderstorm. The only real protection is getting to a safe shelter early and staying there until the storm has passed. A clear plan — who watches the weather, when work stops, where everyone goes, and when it’s safe to return — keeps the crew from making that call in a hurry.
Presenter Script
“Good morning, everyone. Today’s talk is on lightning safety — because on a construction site, we’re often the tallest thing around, standing on metal, out in the open.
Lightning can strike miles from the storm, before the rain even starts. If you can hear thunder, you’re close enough to be struck. So the rule is simple: when thunder roars, go indoors.
Someone has to watch the weather. Check the forecast in the morning and keep an eye on it all day. If storms are possible, we plan ahead for where everyone goes and how we’ll get the word out.
When thunder is heard, stop work — especially at height, on cranes and lifts, on roofs and steel, and in open areas. Lower booms when it’s safe to do so, and get off elevated equipment.
A safe shelter is an enclosed building with wiring and plumbing, or a hard-topped vehicle with the windows up. Open-sided sheds, tents, porta-johns, and trees are not safe. Don’t lean on metal or touch plumbing or wiring while you wait.
Stay in the shelter until 30 minutes after the last thunder you hear. Going back out too early is how a lot of people get hit.
If someone is struck, they don’t carry a charge — it’s safe to touch them. Call 911, start CPR if they’re not breathing normally, and use the AED.
When thunder roars, go indoors, and wait it out. Thanks, everyone — let’s have a safe day.”
Frequently Asked Questions
How close does a storm need to be before we stop work?
If you can hear thunder, you’re within striking distance — lightning can strike about 10 miles or more from a storm. NOAA and OSHA guidance is to move to a safe shelter at the first sound of thunder or sight of lightning, rather than waiting for rain or a nearby strike.
What is a safe shelter from lightning?
A substantial, fully enclosed building with electrical wiring and plumbing, or a hard-topped metal vehicle with the windows closed. Open-sided structures, tents, small sheds, portable toilets, and trees do not protect you. Inside, stay away from windows, plumbing, wiring, and metal that leads outdoors.
How long should we wait before going back to work?
NOAA and OSHA guidance is to wait at least 30 minutes after the last thunder is heard before resuming outdoor work. If thunder is heard again during that time, the 30-minute clock starts over. Many lightning injuries happen to people who return too soon.
Is it safe to touch someone who was struck by lightning?
Yes. Lightning strike victims do not carry an electrical charge. Call 911 right away, and if the person is unresponsive and not breathing normally, start CPR and use an AED. Make sure the area is safe for you, since the storm may still be active.
Does OSHA have a lightning standard?
OSHA does not have a specific lightning standard, but employers have a general duty to protect workers from recognized hazards, and OSHA and NOAA publish lightning safety guidance for outdoor workers. Equipment manufacturers and site rules may also set specific requirements for cranes, lifts, and elevated work.
Does this talk satisfy OSHA training requirements?
No. This talk provides general safety awareness for a toolbox discussion. It does not replace formal, documented training required for the equipment and tasks involved, which should be completed under your employer’s training program and the applicable OSHA standards. The full CrewTalks courses cover these topics in more depth.