I view the flood as local but am always willing to see an arguement that may convince me.
There is good argument for 6th day creation - go forth and multiply and nth day creation of Adam and eve - stay in the garden.
It could be possible that there were 2 seperate creations. 6th day and Adams descendants - after Gods rest
If this is so then 'the sons of God' (who had the breath of life) could possibly have stayed in one area.
7:4 For yet 5750 seven 7651 days 3117, and I will cause it to rain 4305 8688 upon the earth 776 forty 705 days 3117 and forty705 nights 3915; and every 3605 living substance 3351 that I have made 6213 8804will I destroy 4229 8804 from off 5921 the face 6440 of the earth 127.(destroy: Heb. blot out)
127 of the earth
Strong:
H127
Orig: from 119; soil (from its general redness):--country, earth, ground, husband(-man) (-ry), land
Note
The event of rhe tower of babel suggests the descendants of Adam and Noah had not scattered yet and maybe all in one place.
noahs ark was before tower of babel. Tower of babel is linked with the scatter of the indo-euro proto language.
Please tell me what u think?