Wind turbine fire at Bönen closes Hamm to Dortmund railway line

What happened

On Sunday 14 June 2026, the nacelle of a wind turbine at Bönen, near the boundary with Hamm in North Rhine-Westphalia, caught fire at a height of about 95 metres. One of the turbine's 45-metre rotor blades also burned, and the cladding of the nacelle burned away. Dense black smoke was visible over long distances. Because the turbine stands directly beside the Hamm to Dortmund railway line, the line was closed in both directions for several hours from midday while checks were made on whether debris had fallen onto the track.

Residents were advised through a warning app to keep windows and doors closed. According to the local volunteer fire brigade, about 300 litres of gearbox oil were in the nacelle. The turbine shut itself down, so firefighting was not needed. Drone and thermal imaging checks found no remaining embers, and no injuries were reported. The cause was initially unknown.

Contributing factors

According to the fire brigade, about 300 litres of gearbox oil were in the nacelle. The fire brigade suggested the flames may have died down once they were no longer fed by enough flammable liquid after the turbine shut itself down. The cause of the fire was not known at the time of reporting.

Lessons learned

1. Where a wind turbine stands close to a railway or road, operators and emergency services should agree in advance on exclusion zones and on how falling debris will be checked before lines reopen.
2. Large volumes of gearbox oil in the nacelle can sustain a fire at height, so oil containment, leak detection and fire detection in the nacelle are worth reviewing.
3. Automatic shutdown and post-incident thermal imaging checks can help confirm that a fire has stopped, which may reduce the need for active firefighting at height.

More lessons on emergency response and public communication, structural integrity and turbines, detection and monitoring, from every incident on the register.

Source

t-online.de