The New Zealand Ministry of Foreign Affairs says a Fiji cargo ship, carrying 450,000 litres of fresh water, is scheduled to sail to Tuvalu on Friday.
The ship is expected to arrive in Funafuti late in the weekend or early next week.
Meanwhile, a large desalination unit in Tuvalu, which can produce 40,000 litres of water per day, has been shut down for repair. Spare parts for the unit have arrived from Japan.
With the support of a number of desalination units, the ministry estimates more than 1.5 million litres of water is now stored in government and council water tanks in Funafuti.
Red Cross desalination units on Nukulaelae are producing just over 3000 litres of water per day.
The New Zealand Defence Force also has two desalination units which are producing 80,000 litres per day.
