Matthew 24:7 "For nation will rise against nation, and kingdom against kingdom, and in various places there will be famines and earthquakes.
And of course, famines can be the result of wars in geographical areas as well (see Rev. 6), but one connection I've noticed in my study of endtime passages, and watching events unfold around us, I believe that the reason that the natural events being as "birth pangs" as the time of Christ's return draws near is based on an ancient promise made to Abraham, father of the faith of Jews and Christians.
In Gen. 12:3 the LORD said:
Genesis 12:3 3 And I will bless those who bless you, And the one who curses you I will curse. And in you all the families of the earth shall be blessed."
It is also predicted that in the last times, the nations of the earth would gather against Israel, and gather together to destroy her (Zech. 12:1-9; 14:1-9). It comes as a matter of reasoning, that as the nations of the earth gather against Israel, to take away ("divide") her land, that God will curse the nations acting against her.
Of late, seemingly the only nation to bless Israel and stand by her side is Greece, whom Israel has been willing to come alongside. But here in America, as our presidential administration (who got there by our votes, I might add) moves against the holy land, we have seen some scary, Biblical rebukes, the most recent being the giant wall of sand which swallowed Phoenix, Nevada.
But with the devastation of Hurricane Katrina, the tornadoes blowing through our country, the flooding in the Mid-south states, and the natural disasters happening around the world, as time approaches for the international community to force a "two-state" solution on the Jews, though the Muslim world will not recognize her right to existence, expect to see God cursing the nations that come against Zion, the apple of his eye (Deut. 32:10; Gen. 12:3).