Temperatures will climb throughout the week, potentially reaching record breaking levels by Thursday evening.
In the central and eastern parts of England heatwave thresholds are expected to be met as high temperatures persist for three days or more.
The temperatures will remain high overnight into Wednesday, making it uncomfortable to sleep, overnight temperatures of 24C (75.2F).
Marco Petagna, Met Office forecaster said: "On Thursday we'll see an east and west split with showers in the western parts of England but the eastern parts will look very hot with 36 to 37C (96.8F)."
He also said there is a "60% chance" Thursday's weather might surpass the current July record of 36.7C (98.06F) set at Heathrow in 2015 and a "30% chance" of going over the all time UK temperature record of 38.5C (101.3F) which was recorded in Faversham in August 2003.
Thundery showers are expected to hit Bristol in the late hours of Tuesday evening and the early hours of Wednesday morning.
Despite the moody and cloudy atmosphere, temperatures are still expected to be fairly high during the day with a potential 25C (77.6F).
Glasgow will experience heavy showers in the early morning which will later change to a cloudy atmosphere in the late morning.
Mr Petagna has warned "anywhere across England could see some thundery showers".
He added the coolest areas will be in western England, "the temperatures will still be in the 20s so still fairly sunny but this part of England will be the coolest out of the rest".