The Anglia region is included in a Met Office yellow weather warning for the risk heavy rain and localised downpours on Friday and Saturday.
The heatwave has erupted into a string of thunderstorms across the Anglia region. Here is a selection of pictures from ITV Anglia viewers.
The week-long July heatwave in the Anglia region was ended with thunderstorms and torrential rain on Sunday.
New grandfather, the Prince of Wales, met 6-month old Emily Scott as he greeted crowds of well wishers on a visit to Bugthorpe in East Yorkshire today.
A lightning strike caused a house fire in Bedford this morning.
The chimney stack of the house in Primrose Field caught light at around half past six.
The family living there were led to safety. Firefighters in breathing apparatus and an aerial platform were used to bring the fire under control.
These pictures were taken by ITV News Anglia viewer 'Brimski' when the storm was at it's height over Colchester at 3am this morning.
The storms over Northampton last night captured by viewer Mr M.Smith
The heatwave has triggered a string of thunderstorms across the Anglia region.
One weather station at Somersham in the Cambridgeshire Fens recorded 48 mm of rain in just 7 hours from 2am. The average monthly rainfall for July in the Anglia region is around 50 mm (2 inches)
The storms have brought localised flooding as the rain fell onto hard-baked earth and there has been travel disruption and some power cuts.
The white areas on the rainfall radar chart indicate rainfall rates in excess of 32 mm per hour.
Spectacular lightning storms hit parts of the Anglia region on Wednesday night. The heavy rain caused flooding in Norfolk and firefighters have been pumping out people's gardens.
It also caused another of our summer events to be cancelled - a speedway race meeting in King's Lynn.