Heavy thunderstorms are forecast to affect Northamptonshire later today (Friday) and into tomorrow.
The Environment Agency is urging people across the East of England to remain vigilant.
The organisation has warned that intense showers falling on already saturated ground could lead to surface water flooding and possible river flooding from fast responding rivers, particularly across parts of the Midlands and East Anglia.
The Met Office warns that many areas are expected to see between 20 and 30mm of rain, but some parts could see up to 60mm ( almost a month’s worth of rain – in just a few hours.
A spokesman for the agency said: “Flooding from surface water happens when the local drainage system cannot cope with rainfall. It is extremely difficult to predict precisely where surface water flooding will happen as it depends on ground levels, the amount of rainfall, and the local drainage network.”
Toby Willison, Environment Agency Anglian regional director, said: “Although we have seen surface water flooding in this region and difficult conditions for some people, we haven’t so far been as badly affected as other parts of the country. But with this changeable weather we need to ensure we’re prepared for sudden flooding and know what to do if it hits us.
“The combination of saturated ground, high river levels and further forecasts of torrential rain mean people must remain vigilant. The public should check local weather forecasts, and the Environment Agency website for information on a regular basis as flooding can happen very quickly.”
Environment Agency teams have been out across the region to check on flood defences, clear any river blockages and closely monitor river levels. These teams have been working around the clock to reduce the risk of flooding, and will be out in force again over the coming days.
People are urged not to walk or drive through flood waters, which can be dirty, dangerous and full of hidden debris.
The Environment Agency updates its flood guidance every 15 minutes on its website at www.environment-agency.gov.uk/homeandleisure/floods/31618.aspx.