I can not disclose exact details. Best if you just duck and cover. The aftermath will be less severe than you might think, within a decade or two life will be pretty much as it was just prior or early during industrial age. Only we stay inside a bit longer... and die a bit younger...

I hoped I would have had two decades to prepare properly.

There is only one signal left, and if that one sounds in about 34 minutes there is no turning back.