One of the major themes of Isaiah 40-55 is the ‘new exodus’ in which YHWH will finally act to deliver his people.
Isaiah 40:3–5 (ESV) — 3 A voice cries: “In the wilderness prepare the way of the Lord; make straight in the desert a highway for our God. 4 Every valley shall be lifted up, and every mountain and hill be made low; the uneven ground shall become level, and the rough places a plain. 5 And the glory of the Lord shall be revealed, and all flesh shall see it together, for the mouth of the Lord has spoken.”
Isaiah 41:17–20 (ESV) — 17 When the poor and needy seek water, and there is none, and their tongue is parched with thirst, I the Lord will answer them; I the God of Israel will not forsake them. 18 I will open rivers on the bare heights, and fountains in the midst of the valleys. I will make the wilderness a pool of water, and the dry land springs of water. 19 I will put in the wilderness the cedar, the acacia, the myrtle, and the olive. I will set in the desert the cypress, the plane and the pine together, 20 that they may see and know, may consider and understand together, that the hand of the Lord has done this, the Holy One of Israel has created it.
Isaiah 42:14–16 (ESV) — 14 For a long time I have held my peace; I have kept still and restrained myself; now I will cry out like a woman in labor; I will gasp and pant. 15 I will lay waste mountains and hills, and dry up all their vegetation; I will turn the rivers into islands, and dry up the pools. 16 And I will lead the blind in a way that they do not know, in paths that they have not known I will guide them. I will turn the darkness before them into light, the rough places into level ground. These are the things I do, and I do not forsake them.
Isaiah 43:14–21 (ESV) — 14 Thus says the Lord, your Redeemer, the Holy One of Israel: “For your sake I send to Babylon and bring them all down as fugitives, even the Chaldeans, in the ships in which they rejoice. 15 I am the Lord, your Holy One, the Creator of Israel, your King.” 16 Thus says the Lord, who makes a way in the sea, a path in the mighty waters, 17 who brings forth chariot and horse, army and warrior; they lie down, they cannot rise, they are extinguished, quenched like a wick: 18 “Remember not the former things, nor consider the things of old. 19 Behold, I am doing a new thing; now it springs forth, do you not perceive it? I will make a way in the wilderness and rivers in the desert. 20 The wild beasts will honor me, the jackals and the ostriches, for I give water in the wilderness, rivers in the desert, to give drink to my chosen people, 21 the people whom I formed for myself that they might declare my praise.
Isaiah 48:20–21 (ESV) — 20 Go out from Babylon, flee from Chaldea, declare this with a shout of joy, proclaim it, send it out to the end of the earth; say, “The Lord has redeemed his servant Jacob!” 21 They did not thirst when he led them through the deserts; he made water flow for them from the rock; he split the rock and the water gushed out.
Isaiah 49:8–12 (ESV) — 8 Thus says the Lord: “In a time of favor I have answered you; in a day of salvation I have helped you; I will keep you and give you as a covenant to the people, to establish the land, to apportion the desolate heritages, 9 saying to the prisoners, ‘Come out,’ to those who are in darkness, ‘Appear.’ They shall feed along the ways; on all bare heights shall be their pasture; 10 they shall not hunger or thirst, neither scorching wind nor sun shall strike them, for he who has pity on them will lead them, and by springs of water will guide them. 11 And I will make all my mountains a road, and my highways shall be raised up. 12 Behold, these shall come from afar, and behold, these from the north and from the west, and these from the land of Syene.”
Isaiah 51:9–10 (ESV) — 9 Awake, awake, put on strength, O arm of the Lord; awake, as in days of old, the generations of long ago. Was it not you who cut Rahab in pieces, who pierced the dragon? 10 Was it not you who dried up the sea, the waters of the great deep, who made the depths of the sea a way for the redeemed to pass over?
Isaiah 42:11–12 (ESV) — 11 Let the desert and its cities lift up their voice, the villages that Kedar inhabits; let the habitants of Sela sing for joy, let them shout from the top of the mountains. 12 Let them give glory to the Lord, and declare his praise in the coastlands.
Isaiah 55:12–13 (ESV) — 12 “For you shall go out in joy and be led forth in peace; the mountains and the hills before you shall break forth into singing, and all the trees of the field shall clap their hands. 13 Instead of the thorn shall come up the cypress; instead of the brier shall come up the myrtle; and it shall make a name for the Lord, an everlasting sign that shall not be cut off.”