Coiled extension cords can start a fire.

Yes, a partially coiled extension cord can definitely cause a fire.

It’s not the coil itself—it’s the heat. When electricity flows through a cord, it generates heat from resistance. If the cord is coiled up (especially partially), that heat has nowhere to go. It builds up inside the coil until the insulation melts, arcs, and eventually catches fire.

This isn’t theoretical. There are real cases. The thicker the cord and the higher the current, the faster it happens. Cheap, thin-gauge cords are especially dangerous.

Uncoil it fully. Every time. Even if it’s only for a lamp.