A weather warning for thunderstorms and heavy showers is in force across much of southern England and Wales.
The Met Office says damage to buildings as a result of lightning strikes, disruption to public transport and flooding should be expected within the affected areas.
The yellow warning, which covers all of Wales and south-west England, the Midlands and parts of south-east and northern England, came into effect at 1am on Saturday and lasts until midnight on Sunday.
Another weather warning for rain will come into force on Sunday for Wales and central south-west England.
Affected areas could have 50-70mm of rainfall over a few hours, accompanied by hail and frequent lightning.
The stormy weather follows a warm, dry spell. Temperatures reached 25C in parts of the Highlands on Wednesday while south-east England hit the same high on Thursday, according to the forecaster.
The Met Office’s chief meteorologist, Jason Kelly, said: “The warnings cover the areas of the country most at risk of seeing thunderstorms, but not everyone within a warning area will experience a thunderstorm. For many much of the time it will remain dry.”
The Met Office deputy chief meteorologist, Dan Harris, said the wet weather was expected to continue into next week, and the forecaster was weighing issuing another warning for Monday.
“The area of persistent and at times heavy rain that we are expecting to have developed by the end of Sunday will most likely continue for some parts of southern UK through at least the first part of Monday, before starting to clear eastwards,” he said.
“By this time, however, confidence falls sharply in terms of both its exact location and rainfall amounts.”