The sun is used explicitly in the Bible and specifically in Revelation as one of the punishments and plagues during the Tribulation. Who knows how many hundreds of million deaths around the world would be added to the 280 million deaths in this country? If that's not a Tribulation/Apocalyptic scenario I don't know what is.
The sun has been doing this kind of stuff for a very long time. The trouble is ... that we haven’t had some of the more serious “hits” from the sun, as we’ve had in the past in North America and when people lived here in historical times. Back then when it happened, it was a non-event, except for the glowing lights in the sky. Now, it’s the infrastructure of society that is in danger and it’s “that collapse” which would be the problem.
It’s happened before, but we didn’t have today’s infrastructure.