If the water threatens to enter the first floor , move your emergency equipment to the second story if there is one, or onto the roof. Many homes built in flood ravaged areas have a trap door onto the roof because it can be very dangerous getting up there from a window. Stay on the roof where you will be visible to rescue workers. Even 6 inches of fast moving water can knock you off your feet. Electrocution is common during flooding so do not feel obliged to turn off the electricity to the house before you evacuate.
Appliances contain capacitors which hold electrical current even after the unit has been unplugged.
Beware of handling such equipment when standing in water or on wet ground. If the power comes back on unexpectedly you could be at serious risk if standing in water or on a wet floor, and if you or someone else is working on exposed wiring. However, if you have to step in water to reach the electric box, do not attempt to touch it. Call an electrician. Do not assume that just because the electrical meeter has been removed that the power is cut.