105
Free national fault line
Free, 24/7
National Grid Electricity Distribution
Your DNO
serves Merthyr Tydfil
1+
towns covered
incl. Merthyr Tydfil, Aberfan, Treharris
up to £150+
Ofgem compensation
for cuts over 24h
Live outage map for Merthyr Tydfil
The map shows incidents reported by users in real time, centred on Merthyr Tydfil. Zoom in on your street to check whether a cut is your home only or a wider network fault — when neighbours are also dark, it is a National Grid Electricity Distribution job.
Steep Heads of the Valleys terrain at the southern edge of the Brecon Beacons. Atlantic storms hit the Heads of the Valleys; Taff flooding (Storm Dennis 2020) caused major damage at Aberfan and Troedyrhiw.
Live Power Outages in the UK
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Report a power cut in Merthyr Tydfil
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Power cuts by town in Merthyr Tydfil
Pick your town for local outage reports, the live map and your network operator's fault line.
Why the power goes out in Merthyr Tydfil
Merthyr Tydfil is one of the South Wales Valleys' smaller councils, at the head of the Taff valley. NGED's South Wales licence covers the entire area. Steep Heads of the Valleys terrain at the southern edge of the Brecon Beacons.
Weather and terrain. Atlantic storms hit the Heads of the Valleys; Taff flooding (Storm Dennis 2020) caused major damage at Aberfan and Troedyrhiw.
How the network is run. NGED operates from a Merthyr depot. The former Hoover and Welsh Tinplate sites have been progressively redeveloped.
A local quirk worth knowing. Aberfan's heritage memorial site has its own dedicated supply — local outages do not affect the National Memorial Garden.
What to do when the power goes out at home in Merthyr Tydfil
Check whether neighbours are affected
Look at the street lights and the houses opposite. If they're on, your fault is inside your home — check the consumer unit. If they're out too, it is a National Grid Electricity Distribution network fault: call 105.
Dial 105 or 0800 6783 105
Have your full postcode ready. Ask the operator for an estimated time of restoration (ETR) and a fault reference number — both make any later compensation claim faster.
Unplug sensitive electronics
Unplug TVs, routers, computers and consoles to protect them from a surge when supply returns. Leave one light switched on so you'll know visually when the power is back.
Log start and end times
A cut over 24 hours in normal weather entitles you to £75 from National Grid Electricity Distribution under Ofgem's Guaranteed Standards. Severe weather has higher thresholds and a £2,000 cap. Keep a written log with photos — most payments arrive automatically within 10 working days.
The Selectra expert answers your questions on power cuts in Merthyr Tydfil
Always to your Distribution Network Operator, not your supplier. In Merthyr Tydfil that is National Grid Electricity Distribution. Dial 105 (Free national fault line) — free, 24/7 — or call National Grid Electricity Distribution directly on 0800 6783 105.
Atlantic storms hit the Heads of the Valleys; Taff flooding (Storm Dennis 2020) caused major damage at Aberfan and Troedyrhiw. NGED operates from a Merthyr depot. The former Hoover and Welsh Tinplate sites have been progressively redeveloped.
Yes. Under Ofgem's Guaranteed Standards of Performance, domestic customers in Merthyr Tydfil receive £75 after 24 hours off in normal weather, plus £40 every additional 12 hours up to £300. Severe-weather events have higher thresholds and a £2,000 cap. Payment is normally automatic from National Grid Electricity Distribution within 10 working days — claim within 30 days if it doesn't arrive.
National Grid Electricity Distribution announces planned cuts by letter (and increasingly text or email) 2 to 8 days in advance. Most run 8am to 6pm and last 2 to 8 hours. Planned cuts do not qualify for Ofgem compensation unless your DNO failed to give adequate notice (a £40 payment applies then).
Power cuts in nearby areas
Other counties close to Merthyr Tydfil — useful if your storm or fault crosses council boundaries.
Rhondda Cynon Taf
National Grid Electricity Distribution
Caerphilly
National Grid Electricity Distribution
Blaenau Gwent
National Grid Electricity Distribution
Bridgend
National Grid Electricity Distribution
Vale of Glamorgan
National Grid Electricity Distribution
Cardiff
National Grid Electricity Distribution
Torfaen
National Grid Electricity Distribution
Neath Port Talbot
National Grid Electricity Distribution
Other counties served by National Grid Electricity Distribution
Same operator, same emergency number, similar restoration patterns and compensation framework.