Electrical problems rarely arrive without warning. They give signals first, and most of the emergencies we respond to had been announcing themselves for weeks. Here's what to act on.
A burning or hot-plastic smell with no source you can find. This is the one that gets an immediate visit at any hour. Overheating insulation has a distinct sharp, chemical smell. If you notice it near an outlet, a switch, or the panel, shut off that circuit and call.
A warm outlet, switch plate, or breaker. Devices carrying normal load stay at room temperature. Warmth means resistance where there shouldn't be any, typically a loose or corroded connection, and loose connections generate heat that gets worse rather than better.
Scorch marks, discoloration, or a buzzing sound. Brown staining around an outlet slot, a yellowed cover plate, or an audible buzz from a switch or panel all point to arcing. Arcing is what starts electrical fires.
Lights that flicker or dim across multiple rooms. A single flickering fixture is usually a bulb or a loose lamp connection. Flickering across several rooms, or dimming whenever a large appliance starts, points upstream to the panel, the service, or the neutral connection, and a failing neutral can damage electronics throughout the house.
A breaker that won't reset, or that trips with everything unplugged. The fault is in the wiring itself rather than in anything you plugged in. Repeated resetting is the wrong response.
Two-prong outlets with three-prong adapters in daily use. Less dramatic than the others, but it means those circuits have no equipment ground, and every surge protector plugged into one is doing far less than the box promised. Worth planning to fix even if nothing is failing today.
None of these require you to diagnose anything. If you see one, shut off the affected circuit at the panel and call. Just Electric answers at (617) 580-1819 around the clock, including weekends and holidays.