Get a flat extension cord for under carpets.

Yes — flat cords are the right choice, but only if they’re rated for it. A standard round extension cord under a rug is a fire risk: it traps heat, can’t dissipate properly, and the bump creates a tripping hazard.

Flat cords are designed to be low-profile and often have a “carpet runner” rating, meaning they can safely be run under rugs or baseboards. Key is checking the packaging — look for “indoor use” and “flat cord for under carpets.” Even then, don’t cover them with heavy furniture or tightly seal them under tack strips. Heat still needs somewhere to go.

For something permanent along a baseboard, a flat cord is fine. For a temporary setup, just run it along the wall where no one steps. Either way, choose the right gauge for what you’re plugging in — a thin flat cord can’t handle a space heater (nothing thin should, honestly).

Don’t cheap out on safety. A few bucks extra for a properly rated flat cord is worth not worrying about your rug turning into a fuse.