Heat or smoke near outlets, switches, wiring or the electrical panel.
Buzzing or crackling together with a burning smell raises concern for a loose or arcing connection. If the correct breaker can be reached safely, switch it off and leave the damaged equipment untouched.
A burning odor that appears only when an appliance runs may still involve the outlet, circuit or connection serving it. If there is active fire, heavy smoke or immediate danger, move to safety and call 911 first.
Discoloration around a receptacle or switch can show that overheating began before smoke became visible. If there is active fire, heavy smoke or immediate danger, move to safety and call 911 first.
