Flooding could occur in certain parts of England as thunderstorms may bring up to 60mm of rain in just one hour - and potentially cause cars to float.
A yellow thunderstorm warning was issued at 2am for parts of Gloucestershire, the East and West Midlands, the north of England and parts of Wales, and will remain in effect until 5pm on Thursday.
On Thursday morning, eight flood alerts from the Environment Agency were active in the East and West Midlands, with hail and lightning also potential risks.
Heavy showers are anticipated to move north east across parts of England and Wales, potentially causing surface water flooding as the thunderstorms slow down.
Motorists are advised to check road conditions and alter travel plans if necessary, while homeowners are urged to secure movable items such as bins, fences and garden furniture to prevent possible injury.
Dane Broomfield, flood duty manager at the Environment Agency, stated: "Slow-moving heavy rain and showers continuing until late afternoon mean significant surface water flooding is possible but not expected across parts of England today.
"Environment Agency teams will be out on the ground and supporting local authorities in responding to surface water flooding.
"We urge people not to drive though flood water - it is often deeper than it looks and just 30cm of flowing water is enough to float your car."
Stephen Dixon, a spokesperson for the Met Office, stated: "Some heavy and at times thundery rain is moving gradually north east today, with the potential to bring some impacts for some.
"There's a yellow warning for thunderstorms in force until 5pm today and the warning covers much of Wales as well as northern and central parts of England.
"While not everyone will see the highest totals in the warning area, some could see 30-60mm of rain in an hour with hail and lightning additional hazards for some.
"The warning highlights potential difficult travel conditions, as well as the possibility of some flooding in some spots."