Sorry about the flood problems and your FIL Taff! They really can be stubborn when they get up in years, take it from me! Thank goodness you were able to get him to the hospital. Try to rest, and hopefully things will be better tomorrow.
I remember one time when my dear old departed Dad was caught trying to walk out of the hospital in his long johns in sub-zero weather cause he wanted to go home.

I loved him dearly but his behavior kept us on edge in his last few years!