This is only vaguely related but I've been dying to drop this link after recently learning about the "Carrington Event" in 1859

The most powerful geomagnetic storm in recorded history

Likely from the largest coronal mass ejection in modern human history

The natural EMP effect was so powerful, telegraph operators were able to completely disconnect all their batteries and still communicate for hours

https://en.wikipedia.org/wiki/Carrington_Event#Telegraphs

Imagine some future event even more powerful and our dependence on all those LEO sats...