There are factors that can/do modify the answer.
I got an emergency call from my sister recently, who had water shooting "out her washing machine", and all over the floor (in the kitchen across from a 220 stove). The water line to the washer had rotted (and in her case was improperly installed, because the mangled the threads on the spigot).
I would at least turn off those.
What material are your pipes? Do you have any copper/galvanized connections (pipe or hangers, aka dielectic rust).
Does your water heater have a drain pan and overflow? Where is it? (second floor, shop, etc)
Is anyone checking on the inside of your house when gone (use of "facilities")?
Does Murphy pay you regular visits? (some people, if it weren't for bad luck, no luck at all...)
She couldn't tell the difference between the escape pod, and the bathroom. We had to go back for her.........................Twice.