Charles Spurgeon Commentary Genesis 7:10-11

"And it came to pass after the seven days, that the waters of the flood were upon the earth. In the six hundredth year of Noah`s life, in the second month, on the seventeenth day of the month, on the same day were all the fountains of the great deep broken up, and the windows of heaven were opened." — Genesis 7:10-11 (ASV)

Perhaps the world was in its prime, when the trees were in bloom, and the birds were singing in their branches, and the flowers were blooming on the earth, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.