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It’s a piece of advice many of us heard growing up, often dismissed as an old wives’ tale along the lines of not swimming after you eat. But unlike that myth, the warning to stay out of the shower during a thunderstorm is absolutely true and rooted in solid science. Let’s break down exactly why this common activity becomes a significant risk when lightning is in the area.
Yes, it is extremely dangerous to shower, bathe, or wash dishes during a thunderstorm. Lightning can travel through a building’s plumbing, and since water is an excellent conductor of electricity, this turns your faucet and shower head into a direct hazard.
The core of the danger lies in a simple fact: lightning is trying to find the fastest and easiest path to the ground. Unfortunately, the pipes and wires in your home provide a convenient superhighway for its massive electrical charge.
There are three main ways lightning can get to you indoors:
This isn’t just theory; it’s official guidance from leading safety organizations. Both the U.S. Centers for Disease Control and Prevention (CDC) and the National Weather Service (NWS) issue clear warnings about this.
The CDC explicitly states that it is a myth that you are safe from lightning indoors. They provide a clear list of activities to avoid, which are based on the principle of staying away from anything that conducts electricity.
The National Weather Service’s famous slogan, “When Thunder Roars, Go Indoors,” is only half the story. Once indoors, you must stay away from conductive paths to the outside.
To fully appreciate why showering during a thunderstorm is dangerous, we need to understand what lightning actually is and how it behaves. Lightning is not just a simple spark; it’s a complex electrical phenomenon with immense power.
(Compared to household electricity: 120-240 volts)
Within a thundercloud, ice particles and water droplets collide, creating electrical charges. Positively charged particles rise to the top of the cloud, while negatively charged particles sink to the bottom.
The negative charges at the cloud bottom repel electrons in the ground below, creating a positive charge on the Earth’s surface. This creates an enormous electric field between cloud and ground.
When the electric field becomes strong enough (about 3 million volts per meter), a channel of ionized air called a “stepped leader” begins moving downward from the cloud in 50-meter steps.
From tall objects on the ground (trees, buildings, people), positive charges form “streamers” reaching upward to meet the stepped leader.
When a streamer connects with the stepped leader, a conductive path is completed. This triggers the main lightning strike—a massive flow of current from ground to cloud that we see as the bright flash.
Lightning follows the path of least resistance, but this doesn’t mean it takes a straight line. It seeks out materials that conduct electricity well. Here’s the conductivity hierarchy that determines where lightning will travel:
This isn’t theoretical danger. Documented cases provide sobering evidence of what can happen when people ignore thunderstorm safety warnings.
Location: Suburban Dallas, Texas
Date: June 15, 2019
Victim: 34-year-old male
Injuries: Second-degree burns on 30% of body, cardiac arrest, permanent neurological damage
What Happened: The victim was taking a shower during a severe thunderstorm. Lightning struck a tree approximately 50 feet from the house. The electrical charge traveled through the ground, entered the home’s copper plumbing system, and reached the shower. The water flowing over his body provided a direct path to ground through the drain. Paramedics arrived within 8 minutes but noted the victim was found with visible electrical arcing marks tracing the water flow pattern on his skin.
Investigation Findings: The home had no lightning protection system, and while the plumbing was grounded to code, the ground rod was in dry soil with poor conductivity. This forced the lightning to seek alternative paths, including through the home’s plumbing.
But indoor plumbing-related strikes significantly increase risk during storms
| Statistic | Annual Average | Notes |
|---|---|---|
| Lightning Strikes in US | 25 Million | Detected by National Lightning Detection Network |
| Reported Injuries | 300+ | Actual number likely higher (unreported cases) |
| Fatalities | 20-30 | 10% of strike victims die |
| Indoor Lightning Incidents | 30-40 | Approximately 10% of all injuries |
| Plumbing/Water-Related | 15-20 | About 5% of total injuries |
| Permanent Disabilities | 70% of survivors | Neurological damage most common |
Not all indoor activities carry equal risk. Here’s a detailed breakdown of common activities and their danger levels:
Direct contact with water flowing through energized plumbing provides perfect conduction path.
Same plumbing risks as showering, though typically shorter duration of exposure.
Lightning can travel through electrical wiring and surge through devices.
Concrete often contains metal rebar that can conduct lightning energy.
Cordless phones and cell phones (not charging) are generally safe.
In interior rooms, away from plumbing and electronics.
While avoidance is the best strategy, several protective systems can reduce risk if you must be in a thunderstorm-prone area.
Also known as lightning rods, these systems don’t prevent lightning but safely direct it to ground:
These devices are installed at your electrical panel and provide the first line of defense against lightning entering through power lines:
Important: Even with surge protection, you should still avoid plumbing during storms. Surge protectors are designed for electrical systems, not plumbing systems carrying highly conductive water.
Modern electrical codes require bonding of all metallic systems. This means your copper pipes should be electrically connected to your electrical system’s ground. While this helps equalize potential, it doesn’t eliminate risk during a direct or nearby strike.
If someone is struck by lightning (indirectly through plumbing or directly), immediate proper response is critical. Contrary to popular belief, lightning strike victims are NOT electrically charged and are safe to touch.
Check for continued lightning danger, electrical hazards, or structural damage before approaching.
Even if the victim appears fine, internal injuries may not be immediately apparent. Lightning can cause cardiac arrest hours after the strike.
Gently tap and shout. If no response, check for breathing and pulse simultaneously for no more than 10 seconds.
If no pulse or breathing, start CPR immediately. Lightning often causes cardiac arrest that may be reversed with prompt CPR.
Keep victim lying down, elevate legs 12 inches if no spinal injury is suspected, and keep warm with blankets.
Cool burns with cool (not cold) water for 10-20 minutes. Do not break blisters or apply ointments.
If victim fell or was thrown, assume spinal injury and minimize movement until EMS arrives.
| Injury Type | Immediate Symptoms | Medical Response |
|---|---|---|
| Cardiac Arrest | No pulse, unconscious | Immediate CPR, defibrillation |
| Respiratory Arrest | Not breathing, blue lips | Rescue breathing, oxygen |
| Neurological Damage | Confusion, memory loss, paralysis | Neurological assessment, imaging |
| Burns (Lichtenberg Figures) | Fern-like patterns on skin | Burn unit care, infection prevention |
| Blast Injuries | Ruptured eardrums, internal injuries | Surgical intervention if needed |
| Psychological Trauma | Anxiety, PTSD, phobias | Counseling, therapy, medication |
Lightning risk varies dramatically by location. Understanding your regional risk helps in planning appropriate safety measures.
Highest Risk (Flash Density > 20/km²/year):
Moderate Risk (10-20/km²/year):
Lower Risk (<10/km²/year):
Summer (June-August): Peak season nationwide. Afternoon thunderstorms common in most regions.
Spring (March-May): Severe weather season in Plains and South. Early thunderstorms begin.
Fall (September-November): Decreasing activity, but hurricane season brings coastal thunderstorms.
Winter (December-February): Minimal lightning except in coastal regions and during unusual winter thunderstorms.
Children and pets require additional precautions during thunderstorms due to their unique behaviors and vulnerabilities.
Important: Pets are equally at risk from plumbing conduction! Dog bowls connected to automatic waterers, aquariums with electrical equipment, and even metal crates near plumbing can pose risks.
Most lightning fatalities occur outdoors. Understanding outdoor safety is crucial for comprehensive protection.
While the basic 30-30 rule is well-known, here’s an enhanced version with specific applications:
When you see lightning, count seconds until thunder. Divide by 5 to get distance in miles. Example: 15 seconds = 3 miles away.
If flash-to-bang is 30 seconds or less (6 miles), seek shelter immediately. Don’t wait for rain to start.
Substantial building with plumbing and electricity OR fully enclosed metal vehicle.
Wait 30 minutes after last thunder before leaving shelter. Many fatalities occur when people resume activities too soon.
| Scenario | Risk Level | Recommended Action |
|---|---|---|
| Golf Course | Extremely High | Leave immediately at first sign. Do not wait in shelters unless fully enclosed. |
| Boating/Beach | Extremely High | Return to shore at first distant thunder. If caught, stay low in center of boat. |
| Hiking/Camping | Very High | Descend from ridges, avoid isolated trees, seek uniform forest if possible. |
| Sports Events | High | Follow venue instructions. Metal bleachers can conduct through wet clothing. |
| Farming | High | Avoid tractors (rubber tires don’t provide protection). Leave fields immediately. |
Today’s technology provides unprecedented ability to monitor and prepare for lightning threats.
Best: MyRadar, Weather Underground, AccuWeather
Features: Real-time lightning strike maps, distance alerts, forecast integration
Best: Lightning Finder, Blitzortung
Features: Professional-grade detection, historical data, custom alerts
Best: Ambient Weather, Davis Instruments
Features: Local detection, integration with home automation
Smart home systems can now integrate with weather data to automatically:
For many people, particularly children and those with past traumatic experiences, thunderstorms can cause significant anxiety.
Fact: Astraphobia (fear of thunder and lightning) affects approximately 2-3% of the population, with higher rates in children and individuals with other anxiety disorders.
Designate an interior room (preferably without windows or plumbing) as your family’s safe space during storms. Equip it with:
Understanding insurance coverage and legal responsibilities is an important aspect of comprehensive lightning safety.
| Coverage Type | Typically Covered | Important Considerations |
|---|---|---|
| Structure Damage | Yes – direct strikes | May require lightning protection system for full coverage |
| Electronics/Appliances | Limited – usually requires rider | Surge damage often excluded without specific endorsement |
| Plumbing Damage | Usually covered | If lightning causes pipes to burst or leak |
| Fire Damage | Yes – resulting fires | Most comprehensive coverage |
| Medical Payments | Limited – guest injuries | Typically $1,000-$5,000 per person |
1. Document all electronics with serial numbers and values
2. Consider “equipment breakdown” coverage for major appliances
3. Install and document surge protection systems for potential premium discounts
4. Review policy exclusions related to “power surge” versus “lightning strike”
In rental situations, responsibility varies:
Beyond the shower myth, numerous misconceptions persist about lightning safety.
Fact: It’s the metal frame that provides protection, not the tires. The frame acts as a Faraday cage, directing current around occupants. Convertibles, cars with fiberglass bodies, and open construction vehicles offer little protection.
Fact: Lightning frequently strikes the same locations repeatedly. Tall structures like the Empire State Building are struck about 25 times annually. Geographic features and tall objects create preferred strike points.
Fact: Lying flat increases your exposure to ground current. The recommended position is crouching low on the balls of your feet, minimizing contact with the ground.
Fact: While metal doesn’t “attract” lightning from clouds, it can provide a preferential path if lightning is already striking nearby. The primary risk from jewelry is burns from heated metal, not attracting strikes.
Truth: Wireless devices like cell phones and cordless phones don’t attract lightning and are safe to use. However, corded phones and charging phones connected to outlets are dangerous.
Truth: “Bolt from the blue” strikes can occur up to 25 miles from the parent thunderstorm. Never assume you’re safe because the storm seems distant or skies are clear overhead.
Understanding current building requirements helps evaluate your home’s safety level.
Requires bonding of all metallic systems (water pipes, gas pipes, structural steel) to the electrical grounding system.
Specifies requirements for surge protective devices at service entrances.
Requires protection for telephone, cable, and network lines entering buildings.
LPI-175 (based on NFPA 780 and UL 96A) provides comprehensive standards for lightning protection systems:
In over 50 years of tracking (when systems are properly maintained)
Emerging technologies promise to revolutionize how we protect against lightning threats.
Unlike traditional lightning rods that intercept strikes, these systems attempt to prevent strikes altogether:
Future electrical grids will automatically respond to lightning threats:
Emerging technologies for outdoor workers and enthusiasts:
Based on all the information presented, here is your comprehensive safety action plan:
1. Have your home’s electrical and plumbing systems inspected
2. Install whole-house surge protection
3. Consider lightning protection system if in high-risk area
4. Create emergency kits and family safety plan
1. Charge all devices
2. Unplug sensitive electronics
3. Review safety rules with family
4. Prepare safe interior room
1. Move to interior room immediately
2. Avoid all contact with plumbing
3. Stay away from windows and exterior walls
4. Use only wireless or battery-powered devices
1. Monitor weather updates
2. Engage in safe activities (reading, board games)
3. Keep pets in safe areas
4. Have emergency supplies accessible
1. Wait 30 minutes after last thunder
2. Check for damage to home and property
3. Reset clocks and electronic devices
4. Document any damage for insurance
No. For the same reason you shouldn’t shower, you should not wash your hands or do the dishes. Any contact with running water from a faucet connected to your home’s plumbing system is a risk.
Yes, to a degree. Homes with proper lightning protection systems (lightning rods) and correctly grounded plumbing and electrical systems offer more protection by directing the charge to the ground. However, no system is 100% foolproof against a direct or extremely powerful nearby strike. It is always safest to assume the risk exists and take precautions.
Experts recommend following the 30-30 Rule. If you hear thunder, the storm is close enough to strike you. After the last clap of thunder you hear, wait a full 30 minutes before resuming any water-related or outdoor activities. Lightning can, and often does, strike several miles away from the main storm core.
The question “Is it dangerous to shower during a thunderstorm?” opens the door to a much larger discussion about comprehensive lightning safety. Through examining the physics of lightning, analyzing historical data, understanding home systems, and exploring modern protective technologies, we’ve established that:
1. The shower danger is real and scientifically validated – Plumbing systems provide ideal pathways for lightning energy, and water dramatically increases conductivity and risk.
2. Safety requires a multi-layered approach – From proper home construction and protection systems to personal behavior and emergency preparedness.
3. Knowledge is your best protection – Understanding how lightning behaves, recognizing risk factors, and having a clear action plan can prevent tragedy.
4. Technology offers new solutions – From detection apps to smart home integration to emerging prevention systems.
The old advice to avoid showers during thunderstorms stands as valid today as ever, but it’s just one piece of a comprehensive safety strategy. By implementing the knowledge and practices outlined in this guide, you can significantly reduce lightning risks for yourself, your family, and your property.
Remember: Lightning safety isn’t about living in fear—it’s about living with awareness and preparation. When you hear thunder, respect its power, take appropriate precautions, and know that you’re acting on the best available science to protect what matters most.
For a visual explanation on the dangers of using water during a thunderstorm, you may find the following video informative:
Because of these events, you should definitely not do anything that involves water during a thunderstorm.
