Guides

Comprehensive Guide to Thunderstorm Safety in the United States

June 17, 2026 · The Clime Team

Thunderstorms are a common and potentially dangerous weather phenomenon in the United States, characterized by lightning, heavy rainfall, strong winds, and sometimes hail. Understanding and implementing safety measures can significantly reduce the risks associated with these storms.

What Are Thunderstorms and Why Are They Dangerous?

A thunderstorm is a rain-bearing cloud system that produces lightning and thunder. In the U.S., approximately 100,000 thunderstorms occur annually, with about 10% classified as severe, producing hail at least one inch in diameter and/or wind gusts of 58 mph or more. These storms can lead to fatalities and injuries due to lightning strikes, flash floods, hail, and strong winds. (highpoint.edu)

How Can I Protect Myself During a Thunderstorm?

Indoor Safety Measures:

Stay Indoors: Remain inside a sturdy building or vehicle. Avoid open structures like porches or gazebos, which do not provide protection from lightning. (redcross.org)
Avoid Water and Plumbing: Do not bathe, shower, wash dishes, or have any other contact with water during a thunderstorm because lightning can travel through a building’s plumbing. (cdc.gov)
Stay Away from Windows and Doors: Keep away from windows and doors, and stay off porches. (cdc.gov)
Avoid Using Corded Phones: Corded phones are not safe to use during a thunderstorm. However, it is safe to use cordless or cellular phones during a storm. (cdc.gov)

Outdoor Safety Measures:

Seek Shelter Immediately: When you hear thunder, go indoors. If no shelter is nearby, get into a hard-topped vehicle with the windows up. (weather.gov)
Avoid Open Spaces and Tall Objects: Stay away from open fields, the top of a hill, or a ridge top. Avoid tall, isolated trees or other tall objects. (cdc.gov)
Do Not Take Shelter Under Trees: Being under a tree is the second leading cause of lightning deaths. (cdc.gov)
Avoid Water Activities: If you are boating or swimming, get to land and seek shelter immediately. (mass.gov)

What Should I Do After a Thunderstorm?

Wait for the All-Clear: Stay indoors until at least 30 minutes after the last clap of thunder. (weather.gov)
Check for Hazards: Be alert for downed power lines, flooding, and structural damage.
Assist the Injured: If someone is injured by lightning, call 9-1-1 immediately. Provide first aid, including CPR, if the victim is not breathing. You can touch the victim; the lightning’s charge will be gone. (tdi.texas.gov)

How Can I Stay Informed About Thunderstorms?

Monitor Weather Updates: Use a battery-operated NOAA Weather Radio for watches, warnings, and updates from local officials. (army.mil)
Stay Alert: Pay attention to weather alerts and local information. Postpone outdoor activities if the forecast calls for thunderstorms. (redcross.org)

How Does Clime Enhance Thunderstorm Safety?

Clime offers real-time weather updates and alerts, ensuring you receive timely information about approaching thunderstorms. By providing accurate forecasts and severe weather warnings, Clime helps you make informed decisions to protect yourself and your loved ones during stormy conditions.

FAQs

What should I do if I am caught outside during a thunderstorm?

If you are caught outside during a thunderstorm, seek shelter immediately. If no shelter is nearby, crouch down in a ball-like position with your head tucked and hands over your ears and your feet closely together. (cdc.gov)

Is it safe to use a cell phone during a thunderstorm?

Yes, cell phones and cordless phones are safe to use during a thunderstorm if they are not connected to an outlet through a charger. Do not use corded phones. (cdc.gov)

How can I protect my pets during a thunderstorm?

Your pets cannot protect themselves from lightning; it is your responsibility to help protect them. Remove any metal collars, leashes, or harnesses and replace them with plastic. Even though metal does not attract electricity, it is a good conductor and can make injuries, such as burns, worse if struck. (cdc.gov)

By adhering to these safety guidelines and staying informed through reliable sources like Clime, you can significantly reduce the risks associated with thunderstorms and ensure the safety of yourself and those around you.