It's happening with increased regularity for me in California with PG&E's "Public Safety Power Shutoffs", where even with a generator to power my home apparently my ISP cannot be bothered to install generators to power their facilities – and my cable internet goes down for the duration of the PSPS (aside from the first 1-2 hours, as it appears the ISP at least has UPSes). The most recent PSPS lasted 48 hours.
In 2019, cumulative PSPS time was nearly one week (though I logged it at the time I forget the exact number now, something like 150ish hours).
For clarity: living outside SV, my ISP is Comcast (Xfinity).
EDIT: I'd like to add that phone tethering isn't a great fallback (though it's better than nothing), as literally everyone begins using their cell connection for everything which causes the latency to be very high and the speed to be frustratingly low.
In 2019, cumulative PSPS time was nearly one week (though I logged it at the time I forget the exact number now, something like 150ish hours).
For clarity: living outside SV, my ISP is Comcast (Xfinity).
EDIT: I'd like to add that phone tethering isn't a great fallback (though it's better than nothing), as literally everyone begins using their cell connection for everything which causes the latency to be very high and the speed to be frustratingly low.