Was the flood global or regional?

These two articles make me think harder than just thinking that God sent a flood to destroy earth. The Bilble eve says that he sent a flood but it never said if the flood was all over earth but he uses the word earth which makes me believe the flood covered the whole earth. If the flood did cover the earth then maybe God was upset with all the sin going on. I believe the earth was flooded because that is what i always have believed. I also believe it because of how powerful God is and what all he can do. For a Christians view point i would think we all would believe that the whole earth was flooded. For one of these people who is a christain and to agree with some points from a non christian does not need to happening because it could cause other christ believers to think it is ok to believe what non believers think. The flood was a global event and was reached to all corners of the earth. I am taking the side that agrees with the flood all over the earth. The reason i do not agree with the other that thinks it was only a region is because i do not think they have read the bible so they wouldnt know what it says about God flooding the earth.