Alton Towers Resort has closed after an "unprecedented" electrical storm affected the park's water supply.
As thunderstorms and heavy rain sweep across the UK, the Staffordshire theme park said an overnight storm had interrupted the site's water supply.
In a statement on Twitter, the resort said: "Due to the unprecedented electrical storm overnight, we are experiencing some issues with our water supply at the resort.
"We are working to resolve this issue as soon as possible and apologise to visitors today who may be affected."
The company later added: "Please do not travel to the resort.
“We will re-validate any guests who have booked a ticket for today and had their visit to Alton Towers Resort interrupted.
“We apologise for the inconvenience caused and look forward to welcoming you back soon."
It comes as the Met Office said that temperatures had reached 34.6C in central London on Wednesday, marking the first time since at least 1961 that there had been six consecutive days of 34C and above.
The Met Office has issued a yellow storm warning for the whole of England, Wales and areas in Scotland, meaning those regions could see flooding and power cuts from Wednesday afternoon until the end of the week.
It comes after torrential rain and lightning lashed large parts of Scotland causing flooding and travel disruption on Tuesday evening.
Perth and Kinross, the Lothians, Forth Valley and the north-east were among the most affected by overnight lightning strikes and heavy downpours.
The Scottish Fire and Rescue Service confirmed it was called to multiple reports of flooding in the Perthshire area, affecting many properties.
Vehicles were recovered from busy roads after they were abandoned and there were reports of internet services being disrupted.
Ten properties in Lancashire were also affected by flooding following overnight storms, according to the Environment Agency.
Similar conditions are expected to be seen in parts of Northern Ireland, England and Wales from Wednesday afternoon.
The Met Office has warned of potential damage to buildings from lightning strikes or strong winds and a chance of travel disruption due to flooding.
It also warns of 30 to 40mm of rain falling in less than an hour in some places.
