(Image: SOHO Consortium / ESA / NASA)the "we're all gonna die" item of the day: Solar storms...and superflares...
will knock out the internet, power grids etc.
"...From time to time, that wind carries a billion-tonne glob of plasma, a fireball known as a coronal mass ejection (see "When hell comes to Earth"). If one should hit the Earth's magnetic shield, the result could be truly devastating..."
of course, as one comment notes, on the other hand if you just turn off the grid for an hour or two, it won't blow.
The trick is to estimate when the flare will hit.
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