The streams thereof shall be turned into pitch... — The imagery of the punishment which is to fall on Edom is suggested partly by the scenery of the Dead Sea, partly by the volcanic character of Edom itself, with its extinct craters and streams of lava. (Comp. Jeremiah 49:18.) The prophet sees the destruction, as continuing not merely in its results, but in its process, the smoke of the burning craters rising up perpetually, and making the land uninhabitable.
Related Commentaries of Isaiah 34:9
Isaiah 34:9-10
9 And the streams thereof shall be turned into pitch, and the dust thereof into brimstone, and the land thereof shall become burning pitch.
10 It shall not be quenched night nor day; the smoke thereof shall go up for ever: from generation to generation it shall lie waste; none shall pass through it for ever and ever.