A severe warning of heavy rain has been issued by the Met Office for many parts of the UK. The worst affected areas will be the eastern side of the country, all the way from London to as far north as Edinburgh.
The country has already experienced the wettest June since records began and now July promises to see even heavier falls of rain. The Met Office warns of scattered heavy thundery downpours during Wednesday evening and into Thursday morning. It warns that the rainfall could be so heavy as to lead to localized flooding and hazardous driving conditions.
At present Britain is covered with a warm and humid air mass. Temperatures are around 25c (77f) in some parts and with a cold front arriving slowly over the warm air, it will trigger off violent thunderstorms and rainfall predictions of 25mm within just one hour.
On Friday the rain is likely to be "prolonged, quite persistent and heavy," reports The Guardian.
Rain is expected to fall at its heaviest during Friday, with less severe amber warnings issued for central areas of England and Wales, as well as parts of southern Scotland. The rain could well affect the Men's Singles semi-finals due to take place in Wimbledon on Friday.
The longer range forecast is for another two weeks of unsettled weather before more settled conditions arrive in time for the start of the London Olympics on July 27.