[037:076] And We delivered him and his people from the Great Calamity,
[037:077] And made his progeny to endure (on this earth);
[037:078] And We left (this blessing) for him among generations to come in later times:
[037:079] "Peace and salutation to Noah among the nations!"
Prophet Noah, peace be upon him, and his followers (people) were saved. The believers were not drowned. Noah's son was among the disbelievers and he perished.
Noah's offspring after the flood were the fathers and bloodline of Prophets. This I believe is limited to the Middle Eastern Prophets and Messengers.