A yellow weather warning for thunderstorms has been issued across North Wales after days of extreme heat.
The Met Office alert, which comes into force at midnight on Friday, (June 26) stays in place until 10am on the same day and covers most of England and Wales.
Thunderstorms are forecast to move northeast during the early hours of Friday, though the Met Office said many areas may avoid the heaviest downpours.
A Met Office spokesman said: "Thunderstorms may produce sudden, gusty winds with 50 to 60 mph possible, particularly in the south and west of the warning area.
"Frequent lightning, hail and heavy rain - possibly 15 to 20mm in an hour - are additional hazards."
While not all locations will see storms, those that do could experience disruption.
The Met Office is warning that there is a slight chance of power cuts, and that other services to some homes and businesses could be lost.
They also say that there is a small chance that homes and businesses could be flooded quickly, with damage from floodwater, lightning strikes, hail or strong winds.
The warning includes the possibility of delays and cancellations to public transport, as well as difficult driving conditions due to surface water and sudden flooding.
The public has been advised to prepare for potential flash flooding and to secure outdoor items such as bins and garden furniture to prevent them being blown away by gusty winds.
Drivers are encouraged to check travel updates and consider revising their journeys if needed.
In the event of a power cut, residents are advised to prepare by gathering torches, batteries, a phone power pack, and other essential items.
The Met Office also warned against sheltering under trees during thunderstorms and recommended moving to a safe, enclosed space such as a car if caught outdoors.
The Met Office advises the public to stay up to date with the latest weather forecasts and remain alert to any changes in warnings.
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