Dig out your umbrellas - the Met Office has issued a yellow 'be aware' warning for rain.
It looks as though the heatwave is over.
The Met Office says we can expect heavy, thundery downpours later today.
They've issued a warning for the whole of the South East, in place between 4pm today and 9am tomorrow.
A Met Office spokesman said: "There is an increasing risk of heavy rain, with thunder possible, developing over southern England on Tuesday afternoon before spreading northwards during the evening and overnight.
"Many places will miss the worst of the rain, but there is a low likelihood of flooding of homes and businesses as well as disruption to transport."
We will keep you updated as things progress.
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