Article i found on msn today.
The one million spectators expected to flock to Sydney Harbour on New Year's Eve will be treated to the world's biggest ever fireworks display, event organisers say.
The $4 million celebrations are being dubbed a Diamond Night in the Emerald City, with the event also ringing in the anniversary of the Harbour Bridge, which celebrates its 75th birthday in March.
The family show at 9pm (AEDT) is themed to the children's classic The Wonderful Wizard of Oz.
At 9.08pm (AEDT), children will be asked to simultaneously click their heels while an icon of Dorothy's red ruby shoes is projected on the eastern pylons of the bridge.
Four water barges, double the number from last year, will launch fireworks for the family show, while six barges, two more than last year, will do the same for the midnight show.
As hundreds of thousands of dollars go up in clouds of dazzling light and smoke, 12 computers will be used to launch 11,000 shells and 10,000 shooting comets to create a total of 100,000 individual pyrotechnic events.
Pyrotechnicians have designed eight special shells, 25cm in diameter and weighing more than 10kg each, to be launched from four barges at midnight to commemorate the 75th birthday of the Harbour Bridge.
On the bridge itself, 86 firing points have been affixed to launch more than 3,000kg of fireworks into the sky.
The bridge will feature the largest ever illuminated icons - an emerald inside a 110 metre wide coathanger, commemorating the Sydney icon's birthday.
The light show will also include a much larger surprise display, organisers say.
The first light show effects will begin as early as Friday night.
A light system will project questions onto the bridge reflecting aspirations for the new year.
From 1pm on New Year's Eve, aerial, water and pyrotechnic events will take place every hour until the midnight event.
However high winds blowing north or south could postpone the fireworks displays because of safety concerns.
"At the end of the day the weather becomes our only variable," event producer Katrina Marton said.
But rain will not affect the show and could actually enhance its effects, she said.
"Because you get that lovely reflection off the rain and also cloud provides you with a lovely backdrop for the lighting," Ms Marton said.
Some Sydney streets will be closed from 4am on New Year's Eve, with Macquarie Street closing at 10am.
All public vantage points will be closed to spectators once they reach capacity.