Good luck, I am just starting on the research, though we live on rainwater already so have quite a bit of infrastructure to support that. In our case we have 3

Good luck, I am just starting on the research, though we live on rainwater already so have quite a bit of infrastructure to support that. In our case we have 3 x 25kl tanks (so about 20k gallons), with the tanks all concrete and buried which is good for this application. We also already have our own water pump which is inside a building being protected. In our case the 3 tanks all come in to the pump more or less separately, so one required action is to install check valves in each line so if one of the lines is compromised, the others won't leak out through it. As you say, maybe physical presence or maybe sensors. We need to assume we might be forced to evacuate and still want the system to operate, but also consider we might not be able to and might be trapped on site. In our case the water supply should last for at least 24 hours, so I am hoping it will be feasible to just turn it on as we are fleeing, hard to say though. If you have a lot less water you will need to be much more judicious about when to activate it - as late as possible but not too late. We have a Honda EU20i generator which with an extended fuel tank should run for at least a day. Our biggest problem is that one of the buildings is built from cedar. I am not sure how practical it is to prevent such material from catching fire under extreme conditions,m even if it is well hosted down. At least the roof is metal!