Start the generator?
After many power outages, some lasting up to 3 days long due to wind storms or snowfall, I've found it almost mandatory if you are serious about keeping a reef that you need back-up power.
Doesn't matter if you have clams, or any other coral.
I have a 6500 watt generator hooked up to power the whole house when needed. Very handy, and a must have tool around our place.