Powerball has rolled over on Wednesday nightt, which means the jackpot for Saturday night's special Lotto draw to support people and communities impacted by Cyclone Gabrielle is $15 million.

In recognition of this very important cause, Lotto NZ has also announced that Saturday night's draw will be a Must Be Won – which means if there are no first division Powerball winners, the $15 million prize will roll down to the next Powerball division where there are winners.

Saturday's special draw will be the tenth Powerball Must be Won draw in Lotto NZ's history.

In a Must Be Won draw, the jackpot must be shared by one or more Powerball players on the night. If there are no First Division Powerball winners, the jackpot will roll down to the Second or Third Powerball division, until all the prize money is shared.

As previously announced, Lotto NZ is doubling its usual community contribution, so that half of all ticket sales from the Special Draw – or 50 cents from every dollar spent on Lotto, Powerball or Strike – will go to support those communities across the North Island that have been impacted by the cyclone.

'As New Zealand's national lottery, our fundamental purpose is to raise funds for important community causes, and you don't get more important than this,” says Lotto NZ Chief Executive Chris Lyman.

'Saturday's special draw offers Kiwis who want to support those affected by the cyclone a unique way to do so – through a game they already know and love. This is an easy way for those who like to play Powerball to get behind those communities doing it tough right now.

'We also want to remind customers to dream a lot and play only a little. The special draw supports a great cause, but it takes only one ticket to show your support,” says Chris.

Tickets for the special draw can be bought now – either online or instore. Lotto NZ is encouraging players to get in early, by picking up a ticket before draw day or early on Saturday, to avoid the busiest times both instore and online.

Strike has also rolled over on Wednesday nightt, meaning there is a combined prize pool of $16.3 million up for grabs on Saturday.

Lotto First Division will be $1 million and Strike Four will be $300,000 on Saturday.