And thus with Egypt, viz. (Exodus 10:15) "And the L–rd swept an east wind over the land." And thus do you find with the ten tribes, that the L–rd exacted punishment of them with an east wind, viz. (Hoshea 13:15) "For he (Ephraim) flourished among the reeds. (But now) an east wind will come, a wind from the L–rd, rising from the desert, and it will dry up his source and parch his spring. It will despoil the source of all his precious vessels."
God Uses the East Wind as an Instrument of Judgment
Mekhilta Tractate Vayehi Beshalach 5:11