Yes, bathing during a thunderstorm is genuinely dangerous. The CDC explicitly advises against it: do not shower, bathe, wash dishes, or even wash your hands while lightning is active nearby. The risk is low in absolute terms, but the potential consequences are severe enough that every major safety organization treats this as a clear “don’t do it.”
How Lightning Reaches You Through Plumbing
Lightning doesn’t need to strike your bathroom to hurt you. When it hits a building or the ground nearby, the electrical current searches for the easiest path to travel. Metal plumbing pipes are excellent conductors, and many homes have systems that run from the roof or exterior walls down to individual faucets and showerheads. The current travels long distances through these pipes, and when it reaches an open endpoint like a faucet or showerhead, it can jump to the nearest conductor available. If you’re standing in the shower or sitting in a bathtub, that conductor is you.
Water itself also conducts electricity well. So it’s not just about touching a metal faucet. The stream of water connecting the showerhead to your body, or the bathwater surrounding you, creates a continuous electrical path. A bathtub is arguably worse than a shower in this regard, because you’re submerged in a large volume of water with more of your body exposed to the current.
What a Plumbing Strike Can Do to Your Body
Indoor lightning strikes through plumbing are typically less severe than being struck directly outdoors. That’s because the electricity has to travel farther through the building’s infrastructure and has more opportunities to split and dissipate along the way. But “less severe” doesn’t mean harmless.
Lightning carries enough current to disrupt the electrical signals that keep your heart beating and your lungs breathing. Fatalities from lightning strikes most often happen because the strike knocks out the body’s respiratory drive or cardiac rhythm. Beyond the immediately life-threatening effects, survivors can experience tissue burns, nerve damage, seizure disorders, memory problems, sleep disturbances, personality changes, and persistent tingling in the hands and feet. Vision loss, cataracts, retinal detachments, hearing loss, and ruptured eardrums are also documented.
There’s an additional risk unique to being wet: if enough current passes through, it can vaporize the water on your skin into superheated steam, causing steam burns on top of any electrical injury.
How Common Are Indoor Plumbing Strikes?
A systematic review of lightning injury data found that water-related indoor activities (showering, bathing, washing dishes) accounted for about 0.7% of all lightning injuries and 0.1% of all lightning deaths in the dataset. That works out to roughly 30 injury reports and 2 deaths across the sample. These are small numbers, which is partly why this risk feels easy to dismiss. But it’s worth remembering that the denominator is small too: most people do avoid plumbing during storms, which keeps the injury count low. The hazard itself is real and well-documented.
Other Activities to Avoid
The same logic that makes bathing dangerous applies to any contact with your home’s plumbing during a storm. The CDC groups all of these together: washing dishes, washing your hands, and running water of any kind. If it connects you to a pipe, skip it until the storm passes.
Corded phones and wired electronics carry similar risks, since lightning can travel through telephone lines and electrical wiring the same way it moves through pipes. Cordless phones, cell phones, and battery-powered devices are fine because they have no physical connection to the building’s wiring.
How Long to Wait
The standard guidance from the National Weather Service is the “30-30 rule”: if the time between a flash of lightning and the sound of thunder is 30 seconds or less, you should be taking precautions. After the last clap of thunder, wait at least 30 minutes before resuming activities that involve plumbing or wired connections. Lightning can strike from a storm that appears to be moving away, and bolts have been recorded striking more than 10 miles from the center of a thunderstorm. The 30-minute buffer accounts for these trailing strikes.
If you’re mid-shower when a storm rolls in, the safest move is to turn off the water and step out. A disrupted shower is a minor inconvenience compared to the alternative.