﴿ مِّمَّا خَطِيٓـَٰٔتِهِمْ أُغْرِقُوا۟ فَأُدْخِلُوا۟ نَارًۭا فَلَمْ يَجِدُوا۟ لَهُم مِّن دُونِ ٱللَّهِ أَنصَارًۭا ﴾

“And so, because of their sins, they were drowned [in the great flood], and were doomed to suffer the fire [of the hereafter]; and they found none who could succour them against God.”

(Because of their sins they were drowned) by the flood in the life of the world, (then made to enter) in the Hereafter (a Fire. And they found they had no helpers in place of Allah) they had no helpers to defend them against Allah's chastisement.