SO sorry for your issue, I see on the media how bad it is in SC and hope for speedy recovery for all. Underground water tables are exactly that, underground water and you can not control them. We had a similar issue and yes the liner does drop back down, however chances are that it will not come back exactly the way it was, most likely there will be creases. Depending upon how high it went and how long it was up will determine the settlement. I would plan on in the Spring have a expert pool liner company come and drain your pool, reset your liner then fill it back up. Most likely around $500 for the job. No homeowners does not cover it, sorry

The area I work in has fairly high water tables and we see this issue all the time. Steve is right that the liner will rarely go back exactly right and you will most likely find yourself with a few wrinkles. Important to remember that this doesn't damage anything, it's just the aesthetics.

If the wrinkles are minor, some pool service companies should be able to remove the wrinkles without having to drain the whole pool. You should ask around as it's typically a little less expensive then draining it completely.