Grid Fault Cuts Power to 40,000 Households in Western Schleswig-Holstein
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Image credit: Jon Harald Søby · Public domain · Wikimedia Commons
In brief
A fault in a 110,000-volt high-voltage line cut power to up to 40,000 households across five districts in western Schleswig-Holstein on October 18, 2026, grid operator SH Netz said. The resulting overvoltage also sparked several fires, including one that destroyed a thatched-roof house in Bunsoh. Most customers were reconnected within about two hours, but the exact cause of the fault remains under investigation.
Up to 40,000 households in western Schleswig-Holstein lost power on the morning of October 18, 2026, after a fault in the regional 110,000-volt high-voltage grid, according to grid operator SH Netz. The outage began around 9:31 a.m. and affected customers across five districts on Germany's North Sea coast.
Five districts affected
SH Netz, the network subsidiary of energy group Hansewerk, said the outage hit parts of the districts of Dithmarschen, Nordfriesland, Schleswig-Flensburg, Steinburg and Rendsburg-Eckernförde. The fault caused several transformer substations to automatically disconnect as a protective measure against the overvoltage.
Dithmarschen
Nordfriesland
Schleswig-Flensburg
Steinburg
Rendsburg-Eckernförde
Overvoltage triggered several fires
The overvoltage in the network led to several fires. At a transformer station in Friedrichstadt, a surge arrester — a device designed to divert excess voltage safely, similar to a lightning rod — caught fire. No injuries were reported.
In the village of Bunsoh, a fire that started in an electrical fuse box spread through an entire thatched-roof house, causing an estimated 500,000 euros in damage, regional news outlet tageblatt.de reported, citing local fire services. No injuries were reported in that fire either.
Industry publication blackout-news.de additionally reported a fuse-box fire with smoke in the village of Besdorf and a fire at a craftsman's business in Friedrichstadt. The outlet also reported a second outage affecting parts of the same region around 3:20 p.m. that day, during which it said a smoldering fire with smoke occurred at a substation in Linden.
Cause still unclear
a fault in the 110,000-volt high-voltage network
— SH Netz, grid operator
SH Netz confirmed the trigger was a fault in the 110,000-volt network but said the underlying cause of the overvoltage had not yet been determined at the time of its statement. Technical teams were continuing to investigate why the fault occurred and why it produced overvoltage strong enough to damage equipment at multiple substations.
Restoration and wider impact
According to SH Netz, the majority of affected households had power restored by 11:48 a.m., roughly two hours after the outage began. Blackout-news.de reported that the disruption also affected medical equipment in senior care facilities in Albersdorf and Friedrichstadt, and interrupted telephone and mobile network service in several communities. The outlet said Dithmarschen district set up a crisis management team, while Schleswig-Flensburg district established emergency information points in Erfde and Tielen.
SH Netz urged residents in the affected area to have qualified electricians inspect circuit breakers, household wiring and connected appliances for damage, and to contact fire services if they noticed burn marks or smoke on their electrical installations.
Timeline of the outage on October 18, 2026
Time
Event
09:31
Outage begins; up to 40,000 households affected across five districts
~11:48
SH Netz reports majority of households reconnected
~15:20
Second outage reported in parts of the region; blackout-news.de reported a smoldering fire with smoke at a substation in Linden
Questions
How many households were affected by the Schleswig-Holstein blackout?
Grid operator SH Netz said up to 40,000 households lost power at the peak of the outage on October 18, 2026.
What caused the power outage?
SH Netz said a fault in the 110,000-volt high-voltage network triggered overvoltage that caused multiple substations to disconnect automatically. The underlying cause of the fault had not been determined as of the operator's statement.
Did the outage cause any fires?
Yes. Fires or smoke were reported at a surge arrester in Friedrichstadt and at a house in Bunsoh, where a thatched roof burned with an estimated 500,000 euros in damage. Blackout-news.de also reported a fuse-box fire in Besdorf, a fire at a business in Friedrichstadt, and a smoldering fire at a substation in Linden during a second outage later that day. No injuries were reported in any incident.
How long did the power stay out?
SH Netz said most affected households were reconnected by about 11:48 a.m., roughly two hours after the outage began around 9:31 a.m. Blackout-news.de reported a second outage affecting parts of the region around 3:20 p.m. that day.
Which areas of Schleswig-Holstein were affected?
The districts of Dithmarschen, Nordfriesland, Schleswig-Flensburg, Steinburg and Rendsburg-Eckernförde, on Germany's North Sea coast, were affected.
How the world is telling it
GermanGerman regional and industry outlets framed the event primarily as a technical grid failure, focusing on the 110,000-volt fault, the resulting fires at substations and a private home, and SH Netz's ongoing search for the root cause, with detailed local reporting on affected villages such as Bunsoh, Friedrichstadt and Besdorf.
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