Wraysbury & Horton Flood Risk Map

Understand flood risk across our community

Explore Environment Agency modelling to see which parts of Wraysbury and Horton may be more vulnerable to flooding from rivers and surface water.

This map shows modelled long-term flood risk. It does not show current flooding. Use it for community awareness and resilience planning, not to decide whether an individual property will flood.

The map above is not live. Check WHR’s current Risk Updates for local information and practical advice. The Environment Agency service provides official flood alerts, warnings, river levels and the five-day outlook.

View WHR Risk Updates Check official warnings

Check a home or address

Use the Environment Agency’s official postcode service for a more specific long-term assessment around an individual address. It still describes risk around an area and cannot predict whether a particular building will flood.

Check an address on GOV.UK

Understanding the map

Use the layer control in the upper-right corner of the map to switch Environment Agency datasets on and off. More than one flood layer can be displayed at the same time. The opacity control helps keep road names visible beneath the flood information.

Long-term river flood risk

Shows the modelled likelihood of flooding from rivers and the sea, taking account of the presence and condition of flood defences. Defences reduce risk but cannot remove it.

Flood Zones 2 and 3

Show the potential geographical extent of river or sea flooding without taking the benefit of flood defences into account. Flood Zone 3 represents the greater annual probability.

Surface-water flooding

Shows areas where intense rainfall may not drain away quickly enough. This can affect roads and low-lying land away from the river as well as buildings.

What does “1 in 100” mean?

A 1 in 100 annual probability does not mean flooding will happen only once every hundred years. It means there is about a 1% chance of that level of flooding in any individual year, so significant floods can occur within a few years of each other.

Why WHR provides this map

This map is intended to help residents and community organisations consider:

which parts of Wraysbury and Horton are at greater long-term risk;
which roads and access routes could be affected;
where surface-water and river flooding present different risks;
how flooding could isolate parts of the community; and
how the community can prepare before flooding occurs.

Source, currency and limitations

Flood-risk information displayed on this map is supplied by the Environment Agency and reproduced by Wraysbury & Horton Resilience to help the community understand risk across the local area.

The datasets show modelled probabilities, not a prediction of where a particular flood will occur. Actual flooding depends on rainfall, river levels, drainage, groundwater conditions, flood defences and other local factors. Individual buildings may be affected differently because of their height, construction, floor level and surrounding land.

The flood-risk layers displayed on this map are requested directly from the Environment Agency’s published mapping services. WHR does not store or redraw the flood-risk areas, so updated mapping should appear automatically when the Environment Agency updates those services.

These layers show periodically updated, modelled long-term flood risk. They do not show current or real-time flooding.

The Environment Agency’s dataset catalogue provides the latest available metadata and revision dates for:

This community map should not be used for property purchase, insurance, emergency response or planning decisions. For the current local situation, use WHR Risk Updates and official flood warnings. For an individual address, use the official Environment Agency checker.