Joseph preaches that world was destroyed by a flood.
Joseph Smith, Discourse, March 10, 1844, in Wilford Woodruff, Journal, March 10, 1844, MS 1352, Church History Library
. . . in the days of Noah God destroyed the world by a flood & has promised to destroy it by fire in the last days but before it should take place Elijah should first come and turn the hearts of the Fathers to the children &c.