Temperatures will reach 30C in some parts of the country on Sunday - but other regions will be battered by thunderstorms.
The topsy-turvy weather will split the country as, while beaches across the south are expected to be extremely busy again in the heat, families in parts of the Northeast of England and Eastern Scotland are braced for potential flooding.
And a heat health warning from the UK Health Security Agency and the Met Office covers most of England, even the areas where storms are anticipated, and so people are advised to look out for the most vulnerable, such as the elderly.