FloodRadar
Log inCreate free account

Explore FloodRadar

Explore the map
Weather
Why ?

Does AL2 flood?

Yes — parts of the AL2 district carry real flood risk: 23 of its 49 at-risk postcodes reach the Environment Agency's High likelihood band. The AL2 postcode district covers London Colney, Park Street, Shenley, St Stephen, close to Colney Street, Radlett, Water End, and surrounding villages in parts of Hertfordshire and England.

49 postcodes in the AL2 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 23 high, 10 medium, 16 low. A postcode not listed here has no properties in any recorded risk band (which is good news, but never proof it cannot flood).

Free preview first · full report £19

Which AL2 postcodes are at risk?

AL2 1AD up to High AL2 1BA up to High AL2 1BB up to High AL2 1BY up to High AL2 1DP up to High AL2 1DQ up to High AL2 1LJ up to High AL2 1NZ up to High AL2 1PA up to High AL2 1PB up to High AL2 1PE up to High AL2 1QX up to High AL2 1QY up to High AL2 1QZ up to High AL2 1RB up to High AL2 1RE up to High AL2 1RN up to High AL2 1RR up to High AL2 1RT up to High AL2 1RU up to High AL2 1RX up to High AL2 1RZ up to High AL2 2DY up to High AL2 1AH up to Medium AL2 1AZ up to Medium AL2 1DG up to Medium AL2 1DY up to Medium AL2 1LQ up to Medium AL2 1QA up to Medium AL2 1SA up to Medium AL2 2EN up to Medium AL2 2LW up to Medium AL2 3TX up to Medium AL2 1BE up to Low AL2 1BG up to Low AL2 1BJ up to Low AL2 1BZ up to Low AL2 1DT up to Low AL2 1DW up to Low AL2 1FS up to Low AL2 1HG up to Low AL2 1HJ up to Low AL2 1LG up to Low AL2 1QU up to Low AL2 1RD up to Low AL2 1RW up to Low AL2 2JR up to Low AL2 2LN up to Low AL2 3PN up to Low

Rivers and flooding history near AL2

The rivers that matter here, each monitored live on FloodRadar:

144 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (11 at warning level or above), most recently 27 August 2026. Warnings cover flood areas, not individual addresses.

Recorded flood extents near the district (Environment Agency record):

Records, not floods: no outline on the record is not evidence a place has not flooded.

🏠 Buying or renting in AL2? The full property flood-risk report covers any postcode here — the official likelihood band, every recorded flood nearby with distances, warning history year by year, how the local rivers behave, and an insurance outlook, print-ready for £19. See what's in the report →

Flood risk in nearby postcode districts

AL1 AL3 AL4 AL5 AL6 AL8 AL9 AL10

Band = the worst likelihood band of any property in that postcode (EA Risk of Flooding from Rivers & Sea, defence-adjusted, area-level). Check any postcode in detail — or get the full £19 property report — at the property flood-risk report. © 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.