Network issues after thunderstorm?

Has anyone else has this issue before?
Following yesterday's thunderstorm in Tokyo I noticed that the internet in our apartment has been acting up.
I can visit some sites like YouTube but Netflix, Reddit and quite a few other sites and services are down.
Use mobile data and everything works fine.
Annoyingly tv doesn't work either and I can watch YouTube but not Netflix unless I hotspot from my phone.
I've factory reset the Router several times now and I'm still having the same issue.

by northgarden85