Weirdest thing last night. Heard this sound and thought it was fireworks (you know, the traditional Easter fireworks?)

but it wasn't, so thought maybe it's raining. It wasn't. Sounded like water --- a lot --- running, as if someone's house was flooding. Tried to directionalise it but couldn't; could only get that it was coming from one of the houses to the back and right of mine. Went out the front, tried to see if neighbour was in, they didn't seem to be but later I heard them through the wall and they didn't sound like they were drowning.
Went to bed and it was still going on. Now I'm not talking about a drip; this was like someone was running a garden hose or washing their car or something. I mean it was LOUD and CONSTANT. I really worried that someone had maybe left their water running and gone out of their house. Had weird thoughts also about someone killing themselves in their bath and the water overrunning. Really wanted to do something but what can you do? Call the police? Hi, I'd like to report water running, er, somewhere in one of the houses near me?
Thing is, we're currently on a sort of water ration in Dublin because of something to do with the treated water not being up to scratch, and our water pressure is really down. So no-one could have been using a hose or washing anything, or should have been. Plus it went on from approx 7pm till way after I went to bed at 3 am (given the DST yesterday).
It's stopped now and I don't see or hear anything about it, but I do wonder what it was. I hope nobody drowned or had their house ruined. Feel I should have done something but didn't know what to do.
Like I say, weird.