LL18 1AL - Flood, Heat, Air & Subsidence Risk - Rhyl

Denbighshire, Rhyl

Climate risk summary for LL18 1AL

LL18 1AL 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 GeoClimate).

• Flood: Flooding is unlikely but local ponding can still occur.
• Heat: Projected 10 days above 25°C per year, 2021-2040 average (Met Office UKCP18, 50th percentile under RCP8.5, 12 km grid - postcodes within the same grid cell share this value).
• Air quality: PM2.5 4.9 µg/m³ - within the WHO annual guideline of 5 µg/m³ (Defra UK-AIR PCM model, council-level average - every postcode in this council shows this value).
• Ground: BGS data: Eolian Sand geology. Shrink-swell risk classed as improbable (British Geological Survey).

What is the flood risk in LL18 1AL?

Flood risk at LL18 1AL is rated Low, based on Natural Resources Wales flood mapping.

Natural Resources Wales flood zone data shows low flood risk for LL18 1AL 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.

How is the air quality in LL18 1AL?

Air quality at LL18 1AL 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.

Is subsidence a risk at LL18 1AL?

British Geological Survey data classes the underlying soil at LL18 1AL as Eolian Sand, with shrink-swell hazard rated improbable (subsidence risk band: Low). A structural survey is the reliable way to assess ground conditions for a specific property.

Where does this data come from?

This LocalRisk report for LL18 1AL 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 GeoClimate 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.

About the Denbighshire area

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 1AL side by side with any UK postcode at localrisk.co.uk/compare.