Flash droughts have become a growing concern, as they can emerge rapidly and increase the risk of crop failure. Past studies have investigated the meteorological drivers of flash drought; however, meteorology alone cannot fully explain the rapid development of flash droughts, which are driven by complex coupled land-atmosphere processes. Questions remain regarding what processes distinguish flash droughts from traditional droughts, what drives the slow-to-rapid drought transition under a warming climate, and how vegetation may alter drought development. This study delves further into the mechanism by which vegetation regulates flash drought and its future change.