About that Hibiscus, it might not have been doomed. As long as the
root system wasn't severely damaged it could come back into growth.
I am assuming this is/was a Tropical Hibiscus. If you still have the
plant, prune it back, severely, to 8 - 12-inches above the soil like;
if it was branched, try to conserve some of the larger branches. Place
it in the brightest location possible and water only when dry to the
touch. If there is any life left in it, it will sprout new growth
within a few weeks. Once new growth has been initiated, begin watering
as needed to keep the potting mix evenly moist.
Hope this post isn't too late to help.