Fix the water issue first before worrying about which flooring to use.

Agreed - we live at the bottom of the ski hill north of Toronto; we have a crawl space that contains all the house systems but huge damage to furnace etc should it flood (most risk in spring thaw) - we installed a double sump system, two sump holes, two pumps, a battery back-up, and a high water sensor that goes to alarm company (with emergency contractor on retainer) plus heated electrical lines for sump discharge so they can't freeze up in the snow - and we don't store anything in the crawl space that could be damaged by dampness or absorb moisture (such as cardboard).

Thank you...I too have an industrial sized sump pump inside with a backup battery and an additional sump pump in the stairwell outside the basement door. However the power went out and the backup couldn't keep up with the water running down the stairs through the slider which caused the motor to burn out...I've researched concrete flooring and that's what I'm going to do.