Gen 6:13 And God said unto Noah, The end of all flesh is come before me; for the earth is filled with violence through them; and, behold, I will destroy them with the earth.
Gen 6:17 And, behold, I, even I, do bring a flood of waters upon the earth, to destroy all flesh, wherein is the breath of life, from under heaven; and every thing that is in the earth shall die.
Gen 7:4 For yet seven days, and I will cause it to rain upon the earth forty days and forty nights; and every living substance that I have made will I destroy from off the face of the earth.
Gen 7:10 And it came to pass after seven days, that the waters of the flood were upon the earth.
Gen 7:11 In the six hundredth year of Noah's life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.
Gen 7:12 And the rain was upon the earth forty days and forty nights.
Gen 7:17 And the flood was forty days upon the earth; and the waters increased, and bare up the ark, and it was lift up above the earth.
Gen 7:18 And the waters prevailed, and were increased greatly upon the earth; and the ark went upon the face of the waters.
Gen 7:19 And the waters prevailed exceedingly upon the earth; and all the high hills, that were under the whole heaven, were covered.
Gen 7:21 And all flesh died that moved upon the earth, both of fowl, and of cattle, and of beast, and of every creeping thing that creepeth upon the earth, and every man:
Gen 7:22 All in whose nostrils was the breath of life, of all that was in the dry land, died.
Gen 7:23 And every living substance was destroyed which was upon the face of the ground, both man, and cattle, and the creeping things, and the fowl of the heaven; and they were destroyed from the earth: and Noah only remained alive, and they that were with him in the ark.
It appears as if it was world wide,but it would seem like people would not have spread out as far as all the way on the other side of the globe,but God said all living things on earth,so if there were any insects,or animals,on the other side of the planet they would have to go to,and all the high hills under the whole heaven were covered with water,which there is mountains on the other side of the planet.