Do not enter a flooded basement unless you are sure the power is disconnected.
Do not use flooded appliances, electrical outlets, switch boxes or fuse-breaker panels until they have been checked and cleaned by a qualified electrician.
Replace the furnace flue (if removed) and turn off the fuel to the standby heating unit.
Switch on the main electric switch (before, check to ensure appliances, electric heaters, TVs, microwaves computers, etc. were unplugged to prevent damage from a power surge).
Give the electrical system a chance to stabilize before reconnecting tools and appliances. Turn the heating-system thermostats up first, followed in a couple of minutes by reconnection of the fridge and freezer. Wait 10 to 15 minutes before reconnecting all other tools and appliances.
Close the drain valve in the basement.
Turn on the water supply. Close lowest valves/taps first and allow air to escape from upper taps.
Make sure that the hot water heater is filled before turning on the power to it.
Check food supplies in refrigerators, freezers and cupboards for signs of spoilage. If a freezer door has been kept closed, food should stay frozen 24 to 36 hours, depending on the temperature. When food begins to defrost (usually after two days), it should be cooked; otherwise it should be thrown out.
As a general precaution, keep a bag of ice cubes in the freezer. If you return home after a period of absence and the ice has melted and refrozen, there is a good chance that the food is spoiled. When in doubt, throw it out!
Reset your clocks, automatic timers, and alarms.
Restock your emergency kit so the supplies will be there when needed again.