Fetching details from the dictionary...

suspension of water supply; water outage
工事のため明日は断水になります。
There will be a water outage tomorrow due to construction.
断水に備えて浴槽に水を貯めておこう。
Let's store water in case of a water outage.
地震の影響で断水が今も続いているよ。
The water outage continues due to the earthquake.