What should I do if my extension cord feels warm?

Unplug it immediately. A warm cord means it’s overloaded or damaged, which is a fire risk. Check what’s plugged in—a 16-gauge cord handles only 13 amps, but a space heater alone pulls 12.5. If undersized, get a thicker gauge (shorter, lower number); if damaged, replace it. Don’t “keep an eye on it”—warm cords catch fire.