Thunderstorms have started to break out over eastern parts of Norfolk, Suffolk and Essex.
The Met Office has a yellow weather alert in force warning of torrential thundery downpours in places with the risk of surface water flooding. There's also the possibility of hail and strong gusts of wind.
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It will stay cool with a gusty wind during the next couple of days and there'll be further showers.
Between the deluge and the heatwave was a typically average British summer which even threw in a suspected tornado for good measure.
A brief blast of heat from the south will push temperatures to 30ºC in places this Saturday before it all ends in thunderstorms.