MADISON, Wis. -- Even with rain showers in the afternoon, organizers said that Rhythm & Booms is still on and the fireworks will light up the sky Saturday night.

SLIDESHOW: Afternoon Photos Of Rhythm & Booms 2008

Some 250,000 are expected to turn out at Warner Park for the event billed as the "largest fireworks display in the Midwest."

A special traffic plan will be in effect Saturday night to handle the estimated 50,000 vehicles. The plan includes shuttles, road closures and one-way traffic on streets. For more information about the traffic plan, click here.

For the second time, organizers have planned a post-fireworks party to help alleviate traffic congestion after the show.

"Remember that after the fireworks, instead of fighting the traffic, both of our music stages are open. Our great acts, mainliners are on stage from 10 (p.m.) until after fireworks all the way until 11:30. Beer gardens are open, hamburgers and hot dogs, Pepsi and all kinds of things," said Terry Kelly, Rhythm & Booms organizer.

East Gorham Street remains closed for summer construction, WISC-TV reported. Police recommended that people park further away from Warner Park and walk there.

The 35-minute fireworks show is set to begin at 9:30. The fireworks show is choreographed to music, which is broadcast over WOLX-94.9FM. Spectators are encouraged to bring their boom boxes and radios to the park and tune in.

Organizers said they are monitoring the wind Saturday, as they can only shoot fireworks safely if winds are 12 to 15 mph. If winds do not die down by show time, they said the fireworks will be briefly delayed.

In addition to the hundreds of thousands of people, mosquitoes are expected in high numbers Saturday night. Spectators are encouraged to bring mosquito repellent and to wear protective clothing.

Organizers said that people should also come prepared for wet, soft ground at Warner Park and bring something to sit on to stay dry.

For more information on Rhythm & Booms, visit this Web site.