Electrical safety after a flood: what has to happen before the power goes back on

No, not until a qualified repair technician has checked them. ESFI's guidance covers furnaces, freezers, refrigerators, washing machines, and dryers by name: water can damage the motor inside each of these, and a unit that was underwater should be reconditioned by a qualified service technician before it runs again, not tested by plugging it in to see what happens.

Small appliances with exposed heating elements or simple motors are judged the same way. If it was underwater, it goes to a technician or gets replaced; it does not go back on the counter for a test run.

Four things, drawn directly from OSHA's and ESFI's own published flood guidance: do not enter a room with standing water near outlets, cords, or appliances; do not touch an electrical device or switch a breaker while standing in water; do not assume a tripped breaker means the circuit is safe, or that an untripped one means it is not; and do not plug in or run any appliance that was underwater before a qualified technician clears it.

OSHA's own flood-cleanup guidance adds the rule that applies to any wet work area, not just a panel: ground-fault circuit interrupters are required on any electrical equipment used in a wet location during cleanup, including extension cords and corded tools, and that equipment has to be rated and undamaged for wet-location use.

DTE Energy and Consumers Energy split Michigan's service area between them. DTE's own safety page lists 800.477.4747 as the number for an electrical emergency, separate from its gas emergency line, 800.947.5000; calling the gas number about a flooded panel reaches the wrong desk. Consumers Energy's number for safety and service, including requesting a disconnect at the meter, is 800-477-5050.

Either utility can disconnect service at the meter from outside the home on request, which removes the question of whether it is safe to touch the panel yourself. That is a different call than reporting a downed power line outdoors, which both utilities also handle but through the same numbers above, treated as its own emergency.

Yes, in two ways. A sewage backup means any wet electrical component in that room was contaminated at the same time it was flooded, which does not change the electrical safety steps above but does change the cleaning and PPE around the drying work. A sump pump failure often means the pump's own electrical connection, frequently a GFCI-protected outlet near the pit, was part of what got wet, and that outlet and its breaker fall under the same replace-the-safety-device guidance as any other submerged GFCI.

Neither situation changes the core sequence: standing water near electricity means stay out, call a licensed electrician before anything is re-energized, and call Prime to document and dry everything the water reached once it is safe to do so.