Natural Resources Wales (NRW) has declared parts of south‑east Wales, including the Caerphilly area, to be in a formal prolonged dry weather state after successive heatwaves and a near‑total lack of precipitation this month.
What the designation means
NRW said the move, confirmed on 16 July, is the first stage of its drought plan and is triggered when sustained low rainfall leads to falling river, reservoir and groundwater levels. The agency warned the environment is now under significant strain.
“The heatwaves we have experienced this spring and summer are now starting to take their toll on our rivers, lakes, habitats and wildlife,”
The agency added that such extreme weather patterns are expected to become more frequent as the climate changes, with the prospect of wetter winters and drier summers becoming the norm.
Impacts on rivers and wildlife
NRW reported that, so far in July, Wales has received only 5% of its expected rainfall. Water temperatures in several rivers have risen above 20°C, a level that can be lethal to fish. Temperatures in the River Usk peaked at more than 26°C, leaving salmon and other species in distress, the agency said.
Last weekend’s heat and dry conditions in north Wales contributed to a number of serious wildfires and prompted officials to declare a major incident. While those incidents were in the north, NRW has warned that valleys and hillsides across south Wales face an elevated wildfire risk if the dry spell continues.
Advice for residents
NRW supports water company appeals for customers to continue using water carefully. The agency emphasised that reduced usage at home and work helps maintain environmental flows and protect habitats.
- Report environmental incidents, fish in distress or dry riverbeds to NRW on 0300 065 3000.
- If you discover a grass fire or wildfire, move to a place of safety and call 999 immediately.
- Follow water company guidance on saving water and check local updates from NRW and your council.
| Metric | Reported figure |
|---|---|
| July rainfall (so far) | 5% of expected |
| River temperature threshold harmful to fish | 20°C |
| Peak River Usk temperature | 26°C+ |
For communities across Caerphilly county borough and neighbouring areas, the prolonged dry weather designation is a prompt to remain vigilant: protect property and livestock from fire risk, report wildlife in distress and adhere to water‑saving measures. Natural Resources Wales will continue to monitor conditions and may progress through further stages of its drought plan if the hot, dry weather persists.
