The Met Office says the temperature may reach as high as 35 degrees Celsius.
After a largely sunny morning clouds will arrive, it says, bringing an increasing chance of thunderstorms, with possible hail and gusty winds.
By tonight, the Met Office says we can expect scattered showers or thunderstorms, some potentially very heavy with hail and frequent lightning.
Overnight, it will be dry with clear spells, while remaining warm and humid.
According to the Met Office, the minimum temperature overnight will be 16 degrees Celsius.
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