Although the mercury exceeded 33C in Ross-on-Wye, Herefordshire, on Tuesday, the weather is set to change - and the fourth heatwave of the year will come to an abrupt end ... .
A yellow weather warning has been issued for Perth and Kinross with thunderstorms and heavy rain expected to hit the region over the next two days ... .
Met Office weather forecasters have said thunderstorms could create intense flooding over a two day period in some parts of the UK this week, and Brits ought to be prepared ... .