The Met Office has issued a yellow weather warning for the risk of thunderstorms in the Anglia region until Monday 17 August 2020.
The weather warning is in force until 9 pm.
Further heavy showers and thunderstorms are expected at times and may lead to some flooding or travel disruption.
The Met Office weather warning for Monday 17 August says: "Some heavy showers and thunderstorms are expected overnight, with further thunderstorms then developing across many areas of England and Wales during the late morning and afternoon, when they are likely to be slow moving.
"Some places within the warning area will miss the thunderstorms altogether, but where they do occur 20-40 mm of rain may fall within an hour with 50-70 mm possible in 3 or 4 hours."
"Lightning, hail and possibly gusty winds will be additional hazards."
What to expect
Spray and sudden flooding could lead to difficult driving conditions and some road closures
Power cuts might occur and other services to some homes and businesses could be lost
Flooding of homes and businesses could happen quite quickly, with damage to some buildings from floodwater or perhaps lightning.
Fast-flowing or deep flood water is possible.
Where flooding or lightning strikes occur, there is a chance of delays and some cancellations to train and bus services