Heat or smoke near outlets, switches, wiring or the electrical panel.
Turning off one device may not remove the hazard when damaged wiring remains energized inside a wall or box. If the correct breaker can be reached safely, switch it off and leave the damaged equipment untouched.
An acrid plastic or fish-like odor can come from insulation or an electrical component overheating out of sight. If there is active fire, heavy smoke or immediate danger, move to safety and call 911 first.
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.
