Lightning Safety:
When Thunder Roars, Go Indoors

One simple rule can save your life. If you hear thunder, go inside. This page says what to do, in plain words.

The one rule

“When Thunder Roars, Go Indoors!”

If you can hear thunder, you are within striking distance of the storm.

Lightning can strike well away from the rain. It can strike more than 10 miles from the center of the storm.

So do not wait. Hear thunder? Go inside.

No safe place outside

There is no safe place outside when thunderstorms are in the area.

Do not wait for the rain to start before you look for shelter.

And do not leave shelter just because the rain ended. The storm may not be done.

Wait 30 minutes

Stay inside until 30 minutes after the last clap of thunder.

Each new clap of thunder starts the 30 minutes over again.

Most people struck by lightning are hit before or after the worst part of the storm — not during it. That is why the wait matters.

The safest shelter

The safest place is a large enclosed building with electrical wiring and plumbing.

Homes, schools, offices, and stores are good examples.

If lightning strikes the building, the wiring and plumbing carry the charge into the ground.

These are NOT safe shelter

A roof alone does not protect you. These places are not safe in a thunderstorm:

  • Carports
  • Open garages
  • Covered patios and porches
  • Pavilions and picnic shelters
  • Tents

Keep going until you reach a real building.

If no building is near

If no building is available, a fully enclosed vehicle with a metal top is a decent alternative. A car, a van, or a school bus works.

It is the metal shell that protects you — not the rubber tires.

The metal carries the charge around you and into the ground.

Stay safe while inside

Being inside helps a lot. But stay away from these things during the storm:

  • Anything plugged into an electrical outlet
  • Corded phones
  • Computers and other electrical equipment
  • Plumbing — sinks, baths, and faucets
  • Windows and doors

Cell phones and cordless phones are safe to use.

If someone is struck

Lightning victims do not carry an electrical charge. They are safe to touch.

Call 911 right away.

If the person is not breathing, start CPR.

Plan ahead

Before you go out, know where you would go if a storm comes up.

Plan ahead so you can reach a safe place quickly.

Check the forecast. If thunderstorms are expected, it may be best to put the outing off.

All facts on this page come from the National Weather Service (NOAA). Read more on the NWS page: Lightning Safety Overview — weather.gov.

Checked November 2026.