A Plague in the Days of Moshiach?

"...I will no longer smite all living things as I have done." (Bereishis, 8:21)

Will Hashem send another flood (mabul)?

"Rebbi Yossi says:  He will not bring a mabul of water, but a mabul of plague is to be brought on the idolatrous nations in the days of Moshiach."

(Yalkut Shimoni, Bereishis 8)