Here's what the next three days has in store for most parts of the UK.
The Met Office has already received hundreds of suggestions of what to call storms for the upcoming season.
Forecasters have said hail is also possible over northern areas.
Yellow weather warnings for thunderstorms are in place across much of England, Scotland and Wales from noon on Sunday.
One village in Kent saw 42mm of rain in one hour overnight.
Torrential rain and flash flooding has caused travel chaos across parts of the country after half a month's rain fell in just a few hours.