I will answer your question!
Yes. Try to save them. I would, but I'm weird that way. Being that I am new to the koi scene, I cautiously suggest that you might try to set up some sort of aeration/filtration system for them. How big are they? Is a baby pool deep enough? Maybe Rubbermaid containers would work better, since they're deeper and the water won't heat up as fast?
If they are goldfish, they'll be really easy to maintain as long as the water is clean. Koi, I think, are a little trickier. Do they have little moustaches? That's how you can tell if they're koi.
If you have apond store nearby, perhaps they can give you some advice. I would stick them in a suitable container of dechlorinated water, maybe throw in an aquatic plant or two and feed them. If you can hook up a pump to aerate the "tank," that certainly won't hurt them.
Sorry - don't know that I've been that much help... I would say go for it and let us know what happens!