Solar flares

[Highlander]

Can we talk about solar flares for a bit please,... its one of the top threats on my list, but I am not sure about what would survive and what would not

Cars,... ok so I dont have a car older than 1976 so I have problems,... lots of circuits and computer chips to fry,.. but I have also read that [ depending on the strength of the emi ] that some cars would survive quiet well.

All the electrical bits are already inside a metal cage,..I know that the circuits are touching that cage,... but what if everytime we parked up in our garage or carport we were to earth our cars well,.... would the EMI pulse take the easiest route to earth and possibly do less damage that way?

Pull cord generators,... no computer bits in these, if the plug was removed and the generator earth [ as it should be anyway] would they survive?

..... and any other bits of usefull info on such an event would be very welcome