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Yellow weather warning for rain issued by Met Office on day of Senedd by-election

News | Rhys Williams | Published: 13:54, Tuesday October 21st, 2025.
Last updated: 13:54, Tuesday October 21st, 2025

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A yellow weather warning for rain has been issued by the Met Office for Thursday October 23
A yellow weather warning for rain has been issued by the Met Office for Thursday October 23

A Met Office weather warning will be in place across much of south Wales this Thursday, as voters head to the polls in the Caerphilly Senedd by-election.

The yellow weather warning for rain will cover much of Caerphilly County Borough, including the entirety of the Caerphilly Senedd constituency.

The warning will be in place between midnight and 9pm on Thursday October 23. Polls in Caerphilly open at 7am and close at 10pm.

What is a yellow weather warning?

Yellow Warning: Yellow warnings can be issued for a range of weather situations. Many are issued when it is likely that the weather will cause some low level impacts, including some disruption to travel in a few places. Many people may be able to continue with their daily routine, but there will be some that will be directly impacted and so it is important to assess if you could be affected. Other yellow warnings are issued when the weather could bring much more severe impacts to the majority of people but the certainty of those impacts occurring is much lower. It is important to read the content of yellow warnings to determine which weather situation is being covered by the yellow warning.

Amber Warning: There is an increased likelihood of impacts from severe weather, which could potentially disrupt your plans. This means there is the possibility of travel delays, road and rail closures, power cuts and the potential risk to life and property. You should think about changing your plans and taking action to protect yourself and your property. You may want to consider the impact of the weather on your family and your community and whether there is anything you need to do ahead of the severe weather to minimise the impact.

Red Warning: Dangerous weather is expected and, if you haven’t already done so, you should take action now to keep yourself and others safe from the impact of the severe weather. It is very likely that there will be a risk to life, with substantial disruption to travel, energy supplies and possibly widespread damage to property and infrastructure. You should avoid travelling, where possible, and follow the advice of the emergency services and local authorities.

Source: Met Office

The by-election comes after the passing of incumbent Labour MS Hefin David, who died in August, aged just 47.

Council clarifies which areas can vote in upcoming Senedd by-election

Caerphilly’s by-election candidates for October 23

  • Welsh Liberal Democrats – Steve Aicheler
  • Gwlad – Anthony Cook
  • Wales Green Party – Gareth Hughes
  • Welsh Conservatives – Gareth Potter
  • Reform UK – Llŷr Powell
  • UKIP – Roger Quilliam
  • Richard Tunnicliffe – Labour
  • Lindsay Whittle – Plaid Cymru

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