Speaking of the biblical evidence for a local flood, Dr. Michael S. Heiser wrote the following:
First, the phrases in the Flood narrative that suggest a global event occur a number of times in the Hebrew Bible where their context cannot be global or include all people on the planet. For example, the phrase “the whole earth” (kol ‘erets) occurs in passages that clearly speak of localized geography (e.g., Gen. 13:9; 41:57; Lev. 25:9, 24; Judg. 6:37; 1 Sam. 13:3; 2 Sam. 24:8). In such cases, “whole land” or “all the people in the area” are better understandings. Those options produce a regional flood event if used in Gen. 6-8 where the phrase occurs. Second, the Gen. 9:19 clearly informs us that “the whole earth” was populated by the sons of Noah. Gen. 10 (see 10:1) gives us the list of the nations spawned by the sons of Noah—all of which are located in the regions of the ancient Near East, the Mediterranean, and the Aegean. The biblical writers knew nothing of nations in another hemisphere (the Americas) or places like India, China, or Australia. The language of Gen. 10 therefore allows Gen. 7:21 to be restricted to only (or even some) of the people groups listed in the Table o Nations. The interpretation is consistent with a localized flood. Third, the phrase “all humankind” (kol ‘adam) used in Gen. 7:21 also appears in contexts that cannot speak of all humans everywhere (e.g., Jer. 32:20; Psa. 64:9 can only refer to people who had seen what God had done, not people on the other side of the world). Lastly, Psa. 104:9 appears to forbid a global flood, since it has God promising to never cover the earth with water as had been the case at creation. (Michael S. Heiser, Reversing Hermon: Enoch, The Watchers & The Forgotten Mission of Jesus Christ [Defender Publishing, 2017], 278 n. 38)
