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Does HA2 flood?

Yes — parts of the HA2 district carry real flood risk: 13 of its 54 at-risk postcodes reach the Environment Agency's High likelihood band. The HA2 postcode district covers Roxbourne, North Harrow, Headstone, Rayners Lane, close to Pinner, Northolt, Ruislip, and surrounding villages in parts of England and Hertfordshire.

54 postcodes in the HA2 district appear in the Environment Agency's rivers-and-sea flood-risk dataset — worst bands: 13 high, 13 medium, 27 low, 1 very 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 HA2 postcodes are at risk?

HA2 6AA up to High HA2 6AF up to High HA2 6BY up to High HA2 6BZ up to High HA2 6DH up to High HA2 6DQ up to High HA2 6HE up to High HA2 7LD up to High HA2 7RA up to High HA2 7RH up to High HA2 9EY up to High HA2 9HL up to High HA2 9JQ up to High HA2 6AE up to Medium HA2 6BT up to Medium HA2 6DF up to Medium HA2 6DZ up to Medium HA2 6EF up to Medium HA2 7LA up to Medium HA2 7SY up to Medium HA2 9AW up to Medium HA2 9ER up to Medium HA2 9HH up to Medium HA2 9JF up to Medium HA2 9JG up to Medium HA2 9TB up to Medium HA2 6AQ up to Low HA2 6BU up to Low HA2 6BX up to Low HA2 6DG up to Low HA2 6EA up to Low HA2 6HF up to Low HA2 7LB up to Low HA2 7RQ up to Low HA2 7TA up to Low HA2 8SE up to Low HA2 8TP up to Low HA2 9AN up to Low HA2 9AP up to Low HA2 9AR up to Low HA2 9AS up to Low HA2 9AZ up to Low HA2 9BB up to Low HA2 9DA up to Low HA2 9DB up to Low HA2 9DX up to Low HA2 9FB up to Low HA2 9HA up to Low HA2 9HJ up to Low HA2 9HQ up to Low HA2 9JN up to Low HA2 9LD up to Low HA2 9RG up to Low HA2 6ED up to Very low

Rivers and flooding history near HA2

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

323 official flood warnings and alerts have been raised within ~10 km of the district's centre since 2006 (31 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):

🏠 Buying or renting in HA2? 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

HA1 HA3 HA0 HA4 HA5 HA6 HA7 HA8

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.