Nobody was on duty!
The geothermal generators were supplying us with electricity and nobody was there.
The coal consumption of 5000 tons a day is producing 15,000 tons of CO2 and other pollutants a day and despite 30 years of talking about carbon capture it has not been achieved. The simple reason is that it is far too expensive to achieve and coal is only cheap as long as you vent the pollution to the atmosphere for free.
Nobody goes into mining as a lifestyle choice as it is a dirty, dangerous, health destroying occupation and much of the heath costs are taken by the state and paid for out of taxes.
If all the miners were re-employed erecting and installing wind generators and solar panels the miners would have a heathier and more fulfilling life and we would have cheaper electricity.
We need to stop burning coal urgently and build up out renewable electricity capacity and ultimately convert our transport to electricity.