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 there is active fire, heavy smoke or immediate danger, move to safety and call 911 first.
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.
Electrical odors can travel through wall cavities, making the strongest-smelling room different from the source. If the correct breaker can be reached safely, switch it off and leave the damaged equipment untouched.
