http://www.answersingenesis.org/docs2/4377news9-14-2000.asp
"The Bible says that Noah’s Flood was global, but the Black Sea flood was only local. The Bible says the Flood covered the highest mountains, but the Black Sea flood only rose by a few hundred feet. It didn’t even cover the mountains in the local area. The Bible says that Noah built an Ark, but the Black Sea flood needed no such vessel. The water came up so slowly that the residents would have walked to higher land. The Bible says that everyone outside the Ark drowned, but the Black Sea flood simply displaced the residents. The Bible says that only the animals and birds on the Ark survived, but not so with the local Black Sea flood. The Bible says there was forty days of rain, but the Black Sea flood had no rain. The Bible says that the Flood ended when the waters went down and land was dry. But the waters of the Black Sea flood have not gone down yet. The list could go on. There is absolutely no resemblance whatever between the Black Sea flood and the biblical Flood of Noah."
And also God said he would never again flood the entire earth so that all flesh is destroyed Gen 9:11 and we see localized flooding everywhere on earth.
Another "answer from Genesis."