Previous reports of Iranian drones hitting desalination plants, so this may be a response/warning. Seems to be a tit-for-tat escalation which will harm both sides*
The Israeli portal Ynet, citing its sources, reports that the UAE Air Force attacked an Iranian desalination plant.
The publication emphasizes that Israel views this strike more as a signal to Tehran.
It is assumed that the UAE may only join a broader and more open campaign in the event of further escalation of Iranian attacks on Emirati territory.
No official information has been released by either side so far.
*
It has now been determined that the water desalination plant on Qeshm Island, southern Iran, was targeted by the U.S. Army using a PrSM tactical short-range ballistic missile launched by means of ATACMS from Bahrain.
In response, the Iranian Army Ground Forces targeted the water desalination plant in Bahrain, and as a result, people in Bahrain are now suffering from a lack of water, same thing that people in south of Iran have been suffering from yesterday.
Grok: Both claims are supported by official statements and major outlets like AP, Al Jazeera, Reuters.
Iran: US strike (details unconfirmed by US) damaged Qeshm Island desalination plant Sat, cutting water to ~30 villages per FM Araghchi; local officials say supply now stable.
Bahrain: Iranian drone hit their plant Sun morning, material damage + 3 injured per Interior Ministry; no outage, supplies online.