In case someone here hasn't had experience with flushing a toilet without power and water, I thought I'd give some pointers.
It's not your house power that matters unless you are on a well, it is the power at the pumping station with your water/sewer that may be out.
Fill a bucket of water about half or 3/4 full of water and holding the bucket about waist or chest high depending on how tall you are, pour the water all at once into the bowl, which is the round part you sit on. That should cause enough pressure that the toilet will flush itself.
The water you use in the bucket does not have to be fresh drinking water.
Fill your bathtub as full as you can before the storm hits and use this water. If you run out of water you can use any water found in ditches, lakes or streams. Save your fresh, clean water for drinking, cooking, brushing your teeth or washing.
If you have children teach them the old saying:
"If it's yellow let it mellow, if it's brown flush it down!
You should practice a few times before this info is needed.
Another thing to think about is cash. If the power is out in a wide area the banks won't be open and the ATM's won't work, the gas stations won't work so gas up now and get some cash to tuck away somewhere safe.
Since I've been there, done that I thought I would mention a few things.
HTH
:-D