SYDNEY, Australia — Christmas and New Year in Australia typically involve barbecues, beaches and beer.

But a Christmas Day celebration that drew more than 10,000 people has led to a suspension of that tradition on Coogee Beach in the Sydney suburb of Randwick, where officials estimate that revelers left behind more than 16 tons of garbage. The City Council banned alcohol on the beach for the rest of the Australian summer.

“I’m a local, and in all my time here I’ve never seen anything like it,” Tony Waller, president of the Coogee Surf Life Saving Club, told Channel 7, adding that the club used four oxygen cylinders and 15 resuscitation masks to treat drunken partygoers.

“By late evening, it got so bad that we let the shark alarm off three times to try to get the swimmers out of the water, we had such grave concerns for them,” Mr. Waller said. “They were all intoxicated.”