After an extended period of dry weather and low rainfall, a drought in parts of Wales has been officially declared.

On Friday the threshold to trigger drought status in south-west Wales was met, Natural Resources Wales said.

The decision was taken by NRW and the Welsh Government’s Drought Liaison Group after discussing the impact the prolonged heatwave had wreaked on the environment, particularly rivers and reservoirs.

The areas affected include North Ceredigion, Teifi, Pembrokeshire, Carmarthen, Swansea, Llanelli, Neath Port Talbot and Bridgend.

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A hosepipe ban has also been brought into effect in Pembrokeshire and parts of Carmarthenshire due to the strain on public water supplies.

Natalie Hall, from NRW, said: “Prolonged dry weather can lead to drought when rainfall remains low.

“This can impact some of our most precious habitats and species as well as systems we often take for granted, such as our water supplies.

“We have decided to declare a state of drought in south-west Wales after it was clear the lack of rain and recent heat have put a huge strain on our rivers, reservoirs and groundwater levels.

“While certain parts of Wales may be experiencing rain, it can still take a long time to recover from drought, making water a precious resource.”

South Wales Argus: (Natural Resources Wales/PA)(Natural Resources Wales/PA)

The whole region had just 65.5% of its average rainfall in July and all river levels are lower than expected for this time of the year, with the Ewenny, Teifi and Taf being “exceptionally low”, NRW said.

Water levels are so low that in recent days the remnants of Llanwddyn village in Powys, which was flooded in the 19th century to create Lake Vyrnwy reservoir and supply water to Liverpool, has re-emerged.

Hosepipe bans come into force amid hot and dry conditions in the UK

The rest of the country is also being affected by the dry weather, with Wales experiencing its driest five-month period in 40 years between March and July.

Last year Wales used the equivalent of 356 Olympic pools of water every day and in recent weeks the country’s daily demand has increased by 25%.

Experts have said any rain currently forecast is expected to be short, intense and unlikely to change the situation substantially, with very wet weather needed throughout autumn and winter to ensure recovery.