Suburban Area CLIMATE RISK
Groes-lwyd sits inside the Powys council area, made up of residential streets and local-centre parades rather than its own town centre.
Groes-lwyd inherits its flood band (Lower) from the wider Powys council area because Natural Resources Wales does not publish settlement-level breakdowns for every UK location. Search any postcode in Groes-lwyd below for the address-level reading from NRW flood risk maps.
Met Office UKCP18 projections (50th percentile) estimate around 12 days above 25°C per year across the Powys area, averaged over the 2021-2040 period under the RCP8.5 high emissions scenario. These are probabilistic projections - the 50th percentile is the central estimate within RCP8.5; the full range of modelled outcomes is wide and lower emissions scenarios would produce lower figures. Heat exposure within Groes-lwyd varies by property orientation and construction, but the overall heat stress level is relatively low. The headline 12-day figure is a council-level UKCP18 estimate (LAD resolution), not a property-level reading.
Annual mean PM2.5 across the Powys area is 4.5 µg/m³ - close to the World Health Organisation guideline of 5 µg/m³. Within Groes-lwyd, readings are not flat: postcodes within 200 metres of an A-road or major junction routinely run 30-50% higher during weekday rush hours than residential streets two roads back. The figure is a council-level Defra UK-AIR estimate (1km modelled grid).
Ground stability in Groes-lwyd follows the underlying geology more than the postal boundary. The British Geological Survey GeoSure dataset maps clay shrink-swell risk on a 50-metre cell, and properties on the same street can sit in different bands where a clay seam ends mid-road. Pre-1980 housing on clay-rich ground is the most exposed; properties on bedrock or well-drained sandy soils are typically lower-risk. A postcode-level check picks up that variation.
A free postcode check on LocalRisk covers up to six hazards for any address in Groes-lwyd: NRW flood mapping, BGS ground stability, Met Office heat projections, Defra PM2.5, plus coastal erosion and green-space access where relevant. The postcode list below opens an address-level report for each postcode in Groes-lwyd; the council link at the top of this page returns to the wider Powys picture.
Council area level (Powys). Search a postcode for detail.