Met Office Issues Yellow Thunderstorm Warning for Wales

Thunderstorms caused disruption across parts of west Wales on Wednesday afternoon, leaving hundreds of homes and businesses without electricity and affecting rail services in Pembrokeshire and Carmarthenshire.

National Grid reported that power cuts peaked at 1,530 customers after high-voltage faults were triggered during the storms. By later in the afternoon, the number of affected customers had fallen to 138 as repair crews worked to restore supplies and reduce the impact of the outage.

The storm damage also spread to the transport network. Transport for Wales said lightning strikes had damaged the signalling system at Clarbeston Road in Pembrokeshire, creating delays on the rail network. The company said services could be affected while engineers worked on the problem and repairs continued.

The combination of power faults and infrastructure damage highlighted the wider impact of severe weather on essential services in the region. Thunderstorms can quickly disrupt electricity distribution and railway signalling, both of which are vulnerable to lightning and associated faults.

National Grid’s response was focused on restoring power as quickly as possible while monitoring the network for further issues. The reduction in the number of customers without electricity suggested that crews had made progress, although some households were still waiting for service to return.

Transport for Wales warned passengers that delays were possible because of the signalling damage. Railway signalling is critical for controlling train movements safely, and any lightning-related failure can force services to slow down or stop until repairs are completed. The company said work was ongoing to resolve the issue at Clarbeston Road.

The storm-related disruption came amid a period of difficult weather conditions that affected both public utilities and travel in the area. Residents in affected communities faced temporary inconvenience from the power outage, while rail passengers experienced uncertainty over journey times and possible service changes.

Although the number of customers without electricity had dropped significantly from the peak earlier in the day, the event underlined the speed at which thunderstorms can cause local but significant disruption. Utility providers and transport operators continued to deal with the aftermath as conditions stabilized and repairs moved forward.

No details were immediately given on the extent of any long-term damage, but both National Grid and Transport for Wales were actively responding to the incidents. Their efforts centered on restoring normal service after lightning strikes and storm-related faults affected power distribution and railway operations in west Wales.