There have been discussions for years about EMP-proofing the U.S. grid, which would also protect against this (to whatever degree, I’m not qualified to speculat

There have been discussions for years about EMP-proofing the U.S. grid, which would also protect against this (to whatever degree, I’m not qualified to speculate). I seem to recall it’s surprisingly affordable; there was an article about it on HN last year as I recall.