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What happens if all the lights go out? This is the plan for a 'Black Sky' event

By · Published by Everything Blog

In short

The UK government is promoting a nationwide resilience effort instructing households to store vital provisions in case critical national systems fail. A previous flood in Lancaster demonstrated how quickly power cuts disable everyday essentials like mobile signals, water pumps, cash machines, and heating systems. In response, emergency arrangements are leaning heavily on legacy communication tools that bypass standard digital connectivity. As part of this, the BBC has organized a self-sufficient broadcasting team prepared to transmit survival guidelines over generator-backed FM radio.

Key points

  • Energy operators estimate that restoring a collapsed national electricity grid would take…: Energy operators estimate that restoring a collapsed national electricity grid would take approximately two to three days.
  • Emergency broadcasts during a nationwide blackout will deliver pre-arranged public instru…: Emergency broadcasts during a nationwide blackout will deliver pre-arranged public instructions regarding waste disposal and drinking water restrictions.
  • Official contingency planning requires citizens and public services to remain entirely se…: Official contingency planning requires citizens and public services to remain entirely self-sufficient for a baseline minimum of 72 hours.

Sources checked by our analysis pipeline: 1

- Published

It was a Saturday night in early December when Roger Kemp realised something was very wrong.

"I was halfway through a Scandi crime drama when everything went off," the professor at Lancaster University told the BBC. "Streetlights were off. The sodium glow that we can see over the horizon from Morecambe was off."

The next day he went for a walk.

"[It was] almost like a zombie movie," he said. "People trying to find phone reception, wondering where things were, and there was a huge queue at the one working telephone box."

At 22:45 on 5 December 2015, the River Lune - which flows directly through Lancaster - had flooded, and the electricity supply to 61,500 people in the city went.

Households lost light and heat, some water supplies also began to fail because they relied on electric pumps. The railway station closed. So too petrol stations and shops. Most cash machines didn't work. Traffic lights failed.

Why should I stockpile and what will I need?

- Published23 October

The two communication systems that survived were copper wire…

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