Denbighshire, Rhyl
LL18 1AT in Rhyl has a Low flood risk. Heat risk is Lower, with a median (50th percentile) of 10 days above 25°C per year, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario (Met Office UKCP18). Air quality is Low at PM2.5 4.9 μg/m³, within the WHO annual guideline of 5 μg/m³ (Defra UK-AIR). Ground conditions are Low risk, with Eolian Sand geology; shrink-swell risk is classed as improbable (BGS GeoSure).
Flood risk at LL18 1AT is rated Low, based on Natural Resources Wales flood mapping.
Natural Resources Wales flood zone data shows low flood risk for LL18 1AT in Rhyl. The band reflects the highest flood risk within the postcode; some properties within this postcode may face little or no direct flood risk. For a specific property, a conveyancing search will confirm the exact flood zone position.
Air quality at LL18 1AT is rated Low, based on Defra UK-AIR annual mean PM2.5 data. Fine particulate matter (PM2.5) comes primarily from road traffic, industry, and domestic burning. Long-term exposure above the WHO guideline of 5 µg/m³ is linked to respiratory and cardiovascular health risks. Buyers and renters in higher air quality risk areas may wish to consider whether the property is near busy roads or industrial sources.
BGS GeoSure data classes the underlying soil at LL18 1AT as Eolian Sand, with shrink-swell hazard rated improbable (subsidence risk band: Low). Soil type and shrink-swell behaviour drive subsidence claims following dry summers; recent ABI data shows insurer payouts rose sharply after the 2022 and 2025 hot summers. A structural survey is the reliable way to assess ground risk for a specific property.
This LocalRisk report for LL18 1AT draws on four official UK open data sources: Natural Resources Wales flood mapping, Met Office UKCP18 climate projections, Defra UK-AIR PM2.5 monitoring, and British Geological Survey GeoSure subsidence mapping. Risk ratings are a screening tool, complementing - not replacing - the searches and surveys ordered as part of a property transaction. Data covers Denbighshire and is updated as new official datasets are published.
Denbighshire spans upland hills, river valleys and market towns and experiences cool, wet winters and mild summers, shaped by elevation and Atlantic-influenced weather.
Climate risk can change street by street, so it is worth checking neighbouring postcodes too. The full risk report for LL18 1AA is at localrisk.co.uk/postcode/LL181AA, and you can compare LL18 1AT side by side with any UK postcode at localrisk.co.uk/compare.