i know cichlids are more stout fish, but i left a tank at my parents house for weeks without a running filter while i was moving into my house. the three cichlids in it were just fine.
i think a couple days of no power will be fine for our tanks. with the lights out and co2 off we're not looking at algae issues and if you need to get some o2 into the water for the fish you could always manually disturb the water by mixing it.
i'm not too concerned, i have more important things to worry about than fish dying... like possible branches coming through windows, flooding, trees uprooting from the saturated ground and keeping my family safe. if all that happens is i lose my $75 worth of fish i'll consider myself lucky.