The pairing with Parashah Noach, which carries the flood and the covenant God makes with Noah never to destroy the earth by water again, is anchored by a single explicit line: Isaiah names the waters of Noah directly, stating that just as God swore never again to flood the earth, so God now swears not to be angry with Israel again, an explicit textual cross reference rather than a thematic resemblance the reader has to infer.
That directness makes this pairing one of the clearest in the entire annual cycle. Where many haftarot connect to their parashah through shared imagery, a repeated word, or a parallel structure a listener must recognize on their own, this one simply names the earlier story by its central figure and applies its logic forward, permanence promised once is permanence promised again, without requiring any inference at all.
The broader consolation themes surrounding that verse, a barren woman promised descendants, a city rebuilt in security, an invitation to water and food offered freely, extend the covenant logic of Noah's flood into a wider promise of restoration, so that the single explicit echo functions as the anchor for a whole passage of hope built on the same principle the flood covenant first established.