The capital looks set to be in a prime location to catch some big thunderstorms on Thursday as hot temperatures and an unstable atmosphere give way to huge storms.
London looks to be at particular risk with the highest temperatures leading to torrential rain/hail and frequent lightning.
Flash flooding will be the main concern with underpasses being at particular risk of being overwhelmed.
The risk is not just for London though with much of England & Wales at risk of catching a thunderstorm as the day progresses.
Friday should see things calm down whilst the hot weather continues for much of England & Wales with temperatures ranging from 22 to 30c in the London area.