When i was studying the bible, this is what i pictured as the "east wind" (though i thought it was going to be more along the lines of a classical invading army).
Here's a few verses:
Ezekiel 27
1 The word of the LORD came again unto me, saying,
2 Now, thou son of man, take up a lamentation for Tyrus;
26 Thy rowers have brought thee into great waters: the east wind hath broken thee in the midst of the seas.
Habakkuk 1
5 Behold ye among the heathen, and regard, and wonder marvellously: for I will work a work in your days, which ye will not believe, though it be told you.
6 For, lo, I raise up the Chaldeans, that bitter and hasty nation, which shall march through the breadth of the land, to possess the dwellingplaces that are not their's.
7 They are terrible and dreadful: their judgment and their dignity shall proceed of themselves.
8 Their horses also are swifter than the leopards, and are more fierce than the evening wolves: and their horsemen shall spread themselves, and their horsemen shall come from far; they shall fly as the eagle that hasteth to eat.
9 They shall come all for violence: their faces shall sup up as the east wind, and they shall gather the captivity as the sand.
10 And they shall scoff at the kings, and the princes shall be a scorn unto them: they shall deride every strong hold; for they shall heap dust, and take it.
11 Then shall his mind change, and he shall pass over, and offend, imputing this his power unto his god.
Hosea 12
1 Ephraim feedeth on wind, and followeth after the east wind: he daily increaseth lies and desolation; and they do make a covenant with the Assyrians, and oil is carried into Egypt.