A Sandwell May Day 'party-in-the-park'event planned for Monday has been cancelled because of the weather.
More than 10,000 people were expected to be at the festival in Smethwick's Lightwoods Park.
But the heavy rain has meant that the ground has become too wet and slippy making the event too dangerous to stage.
Sandwell Council deputy leader Councillor Steve Eling said it was "extremely disappointing".
Organisers now hope that the feastival can be re-scheduled for Sunday June 10.
Councillor Eling added:"It is a great event that caters for everyone. Last year more than 10,000 attended and had a great time.
"But sadly we have been beaten by the weather. The ground is just too wet for the festival to go ahead safely.
"In addition, the weather forecast for Monday is torrential rain so really we were left with no alternative other than to cancel it.
"I know it will be a huge disappintment for the people in the area, but were are pulling out all the stops to re-schedule it," he added.
The festival is organised by Sandwell Council's Parks and Countryside Service together with the Friends of Lightwoods Park.
Notices are being put up around the park today informing people of the cancellation.