May I draw attention, at this very late date in the proceedings, to the predictions of the Bavarian visionary Mattias Stormberger (died c.1830).
Almost total depopulation is coming as he forecast in Matthias Stormberger: He saw the future, tripod.com. The entire article should be read through to note the accuracy of his vision. Hitler had him on the banned writers' list.
As a footnote I would add that when the event comes about, to have any hope of survival one must be under cover of steel at 850 metres altitude, the height of "the Fuchsenriegel" hill in Austria, and also of the "Nieder Falkenstein castle". "An iron heading" is a steel helmet. Notice that according to Stormberger, Christianity may survive but not the Catholic Church.
In her last authenticated apparition at Akita, Japan in October 1973, Our Lady of All Peoples declared that in the terrible chastisement to be inflicted on all of mankind, "fire will fall from the heavens and annihilate a great part of humanity." This ties in very well with Stormberger's final prediction.
She promised: "I alone am able to save you still from the calamities which approach. Those who place their confidence in Me will be saved."