Can I shower if lightning is 20 miles away?

[LaIsla]

No, you should not shower if lightning is within 20 miles. The core risk is that lightning can travel through your home's plumbing, making you vulnerable even indoors. A common safety guideline is the 30/30 Rule: if you hear thunder within 30 seconds of a lightning flash, the storm is within 6 miles and you are in immediate danger. However, lightning bolts can strike from over 10 miles away, and rare "bolts from the blue" have been documented up to 25 miles from a storm. Therefore, a 20-mile buffer is a prudent, conservative safety measure.

The danger exists because modern plumbing often involves metal pipes that can conduct electricity over significant distances. If lightning strikes your home or nearby ground, the current can travel through these pipes and the water within them. Contact with plumbing fixtures—like taps, showerheads, or even metal drains—during a storm creates a potential path for that electrical current to reach you. This is not a theoretical risk; the U.S. National Weather Service and the CDC specifically list avoiding plumbing as a key lightning safety action.

To make an informed decision, you need to know the storm's actual distance. You can calculate this by counting the seconds between a lightning flash and the sound of thunder, then dividing by five (since sound travels roughly 1 mile per 5 seconds). A count of 30 seconds means the storm is 6 miles away. Any count under 30 seconds indicates the storm is within the high-danger zone of 6 miles. Waiting at least 30 minutes after the last thunderclap before resuming showering is the standard recommendation from safety authorities.

The following data outlines key safety thresholds and lightning behavior to contextualize the 20-mile question:

Safety Metric	Distance / Range	Implication for Showering
High-Danger Zone	0-6 miles	Immediate threat. Absolutely avoid all plumbing and water.
Extended Strike Capability	10-15 miles	Common range for dangerous strikes. Showering is unsafe.
"Bolts from the Blue"	Up to 25 miles	Rare but documented. Justifies a wide safety margin.
Recommended Safe Buffer	20 miles	A conservative, highly safe distance to avoid all risk.

Ultimately, the decision involves weighing a minor inconvenience against a low-probability but high-consequence risk. While the odds of a direct strike to your plumbing are small, the potential for severe injury or fatality is significant. The consensus among meteorologists and safety professionals is clear: when thunder roars, go indoors and stay away from all plumbing and electrical appliances until the storm has completely passed.

[SanEverly]

As a mom, my rule is simple: if we can hear thunder, nobody takes a shower, period. I don't care about counting seconds. My kids know the drill – once the sky rumbles, we stay out of the bathrooms and away from the sinks. It’s just not worth the "what if." I’d rather have them wait an hour than risk something we can easily avoid. This isn’t me being overly anxious; I read the guidelines from weather safety sites, and they all say the same thing: water and lightning don’t mix. So, we play it safe every time.

[Fitzgerald]

I lead hiking and camping trips, so I’m hyper-aware of weather risks. The 20-mile figure you mentioned is actually a great, cautious benchmark. Out here, we use the 30/30 rule for life-threatening situations. But at home, the principle is similar. Lightning is unpredictable. I’ve seen storms where strikes hit valleys miles from the main clouds. If it can do that outdoors, I don’t trust that my home’s pipes are an insulator. My advice? Treat your bathroom like part of the great outdoors during a storm. Delay your shower. Use that time to watch the radar instead. The small hassle of waiting is your best safety protocol.

[OAlivia]

Think of it like this: your home’s plumbing is part of a large, connected metal network. If lightning strikes a power line or the ground near your house, it can use that network to find a path. The shower water you’re standing in completes a circuit. You become the easiest path to ground. That’s the science behind the warning. While the chance is statistically low for any single home, the consequences are extreme. Why gamble on a relaxing shower when you can just wait it out? Storms usually pass within 30 to 60 minutes. It’s a short delay for a major reduction in risk.

[Tim]

A few years ago, a neighbor’s house took a direct lightning hit. It fried their electronics, and they had scorch marks around the faucets. The fire chief told them they were lucky no one was washing their hands or in the shower at that moment. That personal anecdote made the danger real for me. Now, I don’t just avoid showers. I stay off corded phones and avoid touching anything connected to the walls during a storm. The official advice says 6 miles is the critical danger zone, but given that lightning can travel much farther, I’ve adopted my own 20-mile rule. If I see a flash on the horizon, I postpone any activity involving water or appliances. It’s about respecting the raw power of nature and erring on the side of caution. My peace of mind is worth the wait.