Significant flooding has prompted the cancellation of the final day of the Creamfields dance music festival.
Torrential downpours have battered the UK on Saturday with up to an inch of rain falling in some places - and left the Cheshire site looking more like a swamp than a festival venue.
Anyone with a ticket for Sunday is being told not to travel as they will not be allowed in, while those already on site are being urged to be patient while plans are put in place to allow them to leave safely.
Cheshire Police said extra public transport will be laid on.
In a statement, the organisers said: "Following heavy rainfall over the last 24 hours, significant and heavy flooding is affecting the Creamfields arena near Warrington.
"No serious casualties have been reported and Cheshire Police and partner agencies are supporting event organisers in ensuring the safety and welfare of festival goers during this time.
"All customers wishing to come to the festival (on Sunday) are advised that the event entrances are now closed. No entry to the festival is permitted from this point for all ticket types and ticket holders should go to www.creamfields.com for further information.
"Festival goers attempting to leave the site should follow the directions of event staff to ensure the best exit route.
"Further updates will be made available throughout the day in respect of suitable exit routes for those leaving the site and also for those travelling to the site to collect friends or family.
The wet weather caused transport problems across the country and prompted the Environment Agency (EA) to issue a number of flood warnings and alerts.
Britain should get some respite from the dismal Bank Holiday weather on Sunday before further heavy rain and strong winds bring a disappointing end to the long weekend.
More rain is expected in England later, but forecasters said the showers should not be as widespread or heavy as on Saturday.