Does CM8 3UD flood?

Not in an at-risk area

CM8 3UD has no properties in any Environment Agency recorded flood-risk band. That is good news — but it is area-level and never proof a place cannot flood (surface-water and sewer flooding are assessed separately). See the at-risk postcodes in CM8 or get the full picture below.

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Get the full flood report for CM8 3UD — £19 Free preview first · instant access · no account needed The detail below — flood history, warnings, rivers, overflows — is part of FloodRadar's property flood-risk report. The official band above is free; the preview shows more before you decide.

Inside the full report for CM8 3UD

FloodRadarProperty Flood-Risk Report
CM8 3UD
Moderate flood risk — investigate further

Because 6 recorded floods nearby; 43 official warnings since 2006.

A Today — indicative grade (A best → E)
··· By the 2050s — EA climate scenario (in the full report)
⚑ Official warning within 10 km: Yes ⚑ Recorded flood nearby: Yes ⚑ Flood defences within 500 m: Yes ⚑ In flood zone 2 or 3: ···
Rivers & sea
···
Surface water
···
Groundwater
Not assessed
Historic flooding
Recorded nearby
Warning history · flood map with building picker · 2050s view · insurance outlook · every dataset receipt — 18 sections

Flood-risk map of this area

Environment Agency flood-likelihood cells
High (>3.3%/yr) Medium Low Very low Marker = postcode centre Base map © OpenStreetMap contributors

The map above shows the real EA rivers & sea likelihood cells around CM8 3UD. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.

Official flood warnings near CM8 3UD

43
flood alerts & warnings within 10 km since 2009
43
of them full flood warnings or severe warnings
2026
most recent warning nearby (2026-02-15)

Warnings cover flood areas, not individual addresses.

Recorded floods near this postcode

DateRecorded floodApprox. distance
Dec 2013 2013 Flood Outline ~73.3 km
Jan 2009 2009 Flood Outline ~6.3 km
Oct 2001 2001 Flood Outline ~14.1 km
Jan 1968 1968 September Flood Outline ~30.6 km
Jun 1958 1958 Flood Outline ~13.4 km
Jan 1953 1953 Coast Flood Outline Essex ~16.2 km

EA Recorded Flood Outlines — absence of a record never proves a place has not flooded. The full report tests whether any extent covered the exact spot.

Named storms that brought flooding here

2013-14 UK winter floods (2013, 7 warnings nearby) · Chandra (2026, 1 warnings nearby) · Ciara (2020, 1 warnings nearby)

The rivers that matter for CM8 3UD

GaugeRiverDistanceTypical highHighest on record
GUITHAVON VALLEY FGS WITHAM 1.2 km
Guithavon Valley River Brain 1.3 km 0.61 m 1.46 m
Appleford Bridge River Blackwater 2.3 km 1.26 m 2.33 m
Stisted River Blackwater 10.8 km 1.27 m 2.10 m

Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.

Storm overflows within 5 km

OverflowDischarges intoDistanceSpillsHours
Witham Stw Tidal River Chelmer 0.3 km 9 (2024) 32
Great Totham Stw Spicketts Brook Nt Blackwater 4.4 km 0 (2024) 0

Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.

Flood defences

10 mapped flood-defence assets within 500 m — nearest ~232 m (natural high ground, embankment). Defences reduce risk, never remove it.

What the full property report adds

The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.

Flood risk at nearby postcodes

At-risk postcodes near CM8 3UD — all in the CM8 district.

© Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the CM8 district.