Why People Traditionally Avoid Certain Activities During Rainstorms

For generations, grandparents have warned against taking a shower, soaking in a bath, or washing dishes when a heavy rainstorm rolls overhead. While this rule sounds like an old wives' tale, it is actually rooted in real physical danger. Traditional indoor plumbing systems relied heavily on metal pipes running directly from the ground into residential homes. If lightning strikes a building or nearby soil during a rainstorm, the intense electrical voltage travels through metal water pipes and conductive tap water, electrifying showerheads and faucets. Even with modern plastic plumbing, avoiding running water during severe rainstorms remains a practical habit that prevents accidental shocks.