Eldred G. Smith teaches God destroy all "except Noah and those with him" at the Flood.
Eldred G. Smith, "The World Needs Healing," Improvement Era 71, no. 12 (December 1968): 63
There should be no doubt in the minds of any of us that the world is not well. It is not dying yet, but it is sick. It does not have an incurable disease, for we have a good physician. The world just needs healing.
This is not new in the world. There have been problems and crises off and on from the very beginning of mortality. The scriptures are replete with references concerning similar conditions. The Lord has, from the very beginning, given man warnings and promises. Should the scriptures fall open at almost any place, they would very likely reveal the remedy for all problems, even present-day conditions.
Adam and Eve were admonished to repent and be obedient to God's command. Yet, by the time of Noah the world was so sick, God had to destroy all except Noah and those with him.