As an aside, I can't believe there were only around 100 casualties in that blast. It looked like it would have killed a lot more people than that, though I don't know how dense the population was in that particular area at the time. Scary stuff.
Numbers are still growing and same as yours i dont really believe that it do only killed 100 but basing of on wounded which is nearly 6000 and still counting.When i saw some feed in facebook on such explosion
i though it was just an another movie or some sort but actually its real which i cant believe to happen in times like these(pandemic situation).
Going back into topic about storage of your keys via HW,Paper or other ways then its really hard to recover this up once you lost these things in possession.It might not really be ideal
to store up your PK's in cloud but i actually save up some pk in my email but in a scattered manner so no one will able to know if someone do have access on it but to think
it would be hard to bypass unless google itself will fucked you up.