The Met Office has issued a yellow weather warning for the risk of heavy rain on Bank Holiday Monday.
The warning has now been extended to cover all of the Anglia region.
The Met Office Chief Forecaster says: "Rainfall amounts are likely to exceed 15 mm quite widely, while a few places could see more than 30 mm.."
The warning is valid from 6.00am on Monday 25 August 2014 until 11.50pm.
"Heavy rain will spread from the southwest on Bank Holiday Monday. A complex area of low pressure will bring an unpleasant day's weather to much of England and Wales on Monday. The public should be aware that there may be some impacts to holiday traffic and outdoor activities."
After a dry and hot spell last week, the weather changed to bring more than a month's worth of rainfall in 24 hours.
It will be a grey day with outbreaks of rain. The rain will be heavy at times in the north but further south it should turn drier
Some parts of the Anglia region have seen nearly a month's worth of rain in less than a day as a deluge breaks a three-week drought.