Yep had a leak pan , I raised the tank about 8 inches so I can have the leak pan go into a tub. This ifvinternal leaks
I have a small pump that I used to use to empty kids little pools , that pump now goes into a rubbermaid 18 gal tub that has a regular sump pump that empties outside.
I have heard about valves that shut off if it detects water running too much.
If you already have the leak pan off the ground, put a sensor in the pan to generate an alarm so you know you have a problem. Hook the pan up to something like this to pump any water to a slop sink, or other outgoing drain connection so it will deal with any water until you can get to the stopcock.