This was covered back in the Present Perfect lesson https://www.duolingo.com/skill/it/Verbs%3A-Present-Perfect. Unfortunately, (at present) we can't see the Tips and Notes from Duolingo's mobile apps. So, even when I am doing the exercises on the mobile apps, I still open up a browser on my phone or tablet to consult these helpful discussions.
I'd say no, only because the meaning of the phrases are slightly different. The topic sentence means "they are left without water", or "they ended up without water", whereas your phrase seems to imply that they stopped without water on purpose. (the topic phrase could mean what you said, but it has a wider scope of meaning).
I have an issue with the pronunciation here. If I play the entire sentence the first word sounds like "erano". If I hover over the actual word I get Err-rrann-no with a pronounced stress on the first syllable. Are there any native speakers who could explain which is correct?
I don't think DL can fix this because of the site that they're using for pronunciation, but the hover-over pronunciation is correct. "Erano" gets its stress on the first syllable.
In general, conjugating a verb in the "loro" form almost always bumps the stress to the syllable before the modified ending, i.e. "riEscono", "vOgliono", "capIscono".