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."
It will become cloudy this evening with a chance of showers arriving from the west. Lows of 15 deg C.
It will be a dry and warm night with some clear spells and light winds. Lows of 15 deg C (59 deg F).
Tuesday was the hottest day of 2016 so far with temperatures in the Anglia region climbing close to 32°C.