The Rolling Stones have landed in Toronto and organizers are putting the finishing touches on what's expected to be one of the most important events in modern music history.

The Stones and their entourage arrived in Toronto aboard their chartered jumbo jet around 7:30 p.m. Monday and were quickly whisked off via limo to the Four Seasons, where they're staying  this week.

On Wednesday, about 450,000 music fans are expected to roll into Toronto's Downsview Park to hear them in concert. The show, which has been dubbed SARS-stock, features 14 bands besides the Stones and has raised more than $400,000 so far. The proceeds will go to hospitality and health care workers hit by the SARS crisis.

Though critics had warned the short notice for the massive benefit event wouldn't allow for enough preparation, everyone involved says plans are on track for Wednesday's show.

"It's a beehive of activity. Everyone is working non-stop and the stage looks great," said Ontario Health Minister Tony Clement, who visited the site over the weekend.

Weather forecasters are predicting mostly sunny skies over Toronto with a high of 27 degrees Celsius -- perfect weather for outdoor revelry. It's a forecast that probably makes most concert-goers glad organizers have relaxed the rules enough to allow them to bring in sunscreen.

For those who didn't catch the updates, those relaxed rules also mean concertgoers are now allowed to bring in cushions and blankets, snack foods, disposable cameras and cell phones. But items like umbrellas, chairs, strollers, and cans and glass are still not allowed. (For a complete list of what's allowed and what's not, click here).

Revelers are bracing themselves for heavy crowds and long delays. Toronto Police Chief Julian Fantino warned Monday the worst will likely come when the show ends.

That's because they hundreds of thousands of people expected to attend will likely pour into Downsview over the afternoon and early evening. But once the show ends, people will be anxious to get out. To prevent a crush, on-site security will be staggering groups as they depart through the park's three gates.

"We can't have the subway system jammed with people. It will be a hazard," Fantino told a news briefing.

Overall, Fantino appeared confident the show would go smoothly.

"(We'll be) showing the world not only that Toronto can put on a world class event but also that the police service is competent and capable of rising to all these challenge," Fantino said.

"I anticipate the majority of people who will come to this concert will be wanting to have a safe event ... we'll deal with problem people.''

With a report from The Canadian Press