An electrical emergenc is a failure that makes part of a home or business unsafe to occupy or use. Arcing, overheating, electrical shocks, water near energized equipment, damaged service wiring, and recurring power interruptions can indicate an active fire or electocution hazard. A single nonworking outlet might not be a big deal if there are no other warning signs, but heat, noise, odor, sparks, or discoloration need attention as soon as possible.