Heavy rain has caused problems for businesses and events across Teesside and County Durham.
It has forced the cancellation of the Cleveland Show due to be held in Middlesbrough's Stewart Park on Saturday, 28 July.
Deputy Show Director, Barrie Robinson, said organisers were left with "no other viable alternative".
The Met Office has issued a yellow alert of rain, urging people to be aware of conditions.
The Cleveland Show attracts thousands of people from all over the region each year, with about 10,000 attendees in 2010 according to its organisers.
The wet conditions have left the ground in the park sodden and the committee did not want to risk causing lasting damage.
Mr Robinson said: "We have considered alternative venues but they are similarly sodden.
"The long-term weather forecast offers little hope of much sunshine, and adding this to the logistics of relocating the show so close to the event we are left with no other viable alternative."
But organisers of the Stockton Cycling Festival said the event would go ahead "whatever the weather".
The festival, in its second year, will see professional races and demonstrations over the course of the weekend at various locations within the borough.
Flash floods hit parts of Whorlton near Barnard Castle on Thursday.