The Met Office has issued a yellow alert for rain, ensuring the public to "be alert" of potential torrential downpours today.
A Met Office forecaster said: "Isolated thunderstorms with very heavy rain, hail and gusty winds are possible later this afternoon and early evening.
"The public should be aware of the risk of very localised surface water flooding, particularly if the thunderstorms affect urban areas".
"These could produce 30 mm of rain in less than an hour, large hail and also squally winds".
More top news
Squatters shacked up in a grand building metres away from Buckingham Palace have been evicted in an early morning "stealth mode" operation
Four men have been arrested after a 21-year-old man was murdered in Lewisham
London is the second least affordable city in the UK, while commuter hotspot St Albans has seen the biggest prices rises