Fireworks officially went on sale on Friday and people were lining up outside The Warehouse in Blenheim before the shop even opened, the manager said.
Blenheim branch manager Ian Daubney said the store expected to sell 25 per cent more fireworks than last year.
A 12-metre container with hundreds of boxes of fireworks inside had almost sold out by 3pm on Friday.
"We won't have any left by the end of Monday," he said.
He said strict rules were in place to check identification so no fireworks were sold to anyone under the age of 18.
Assistant store manager Warren Peter said the most expensive box of fireworks, the Moon Striker on sale for $200, was the first to sell out. The $100 box had also proved popular.
He expected all the fireworks would be sold out by noon today.
Lights Over Marlborough, the annual Whitney Street School fireworks spectacular, will be held on Saturday, November 17, at the A&P Showgrounds in Blenheim.
The event, which is the school's major fundraiser, is in its 29th year.
Last year it attracted a crowd of about 5000 people.
Tickets for adults and children aged 5 and over are $7.
Gates open at 6pm.
The Marlborough Express