Wattisham in Suffolk was the wettest place in Britain on Saturday night with 31 mm (1.2 inches) of rain falling between 10pm and 10am on Sunday morning.
That amounts to more than the fortnight's worth of rain in just 12 hours.
More scattered heavy showers are forecast for the rest of Sunday and the Met Office has issued a further yellow weather warning for more heavy rain.
With temperatures expected to rise during the coming week, it's possible it could hit 30°C for the first time this year in East Anglia.
Currently the highest temperature of the year in the Anglia region is 28.7°C recorded at both Writtle, Essex and Weybourne, Norfolk on 4 July.