Burning Man festival-goers have been told to conserve their food and water after heavy rain turned the campsite into a mud bath.

The weather has been so bad that access in and out of the event in the US state of Nevada has been “halted”, organisers said in a statement. US media reported that more than 70,000 people were stuck there on Saturday.

Held in Black Rock Desert, the annual festival is one of America’s most well-known cultural events.