A handicap accessible doorway includes a frame having side jambs and a low profile sill extending between the bottom portions of the jambs. A flexible fin extends along the length of the sill and projects upwardly therefrom to form a water dam. The flexible fin is sealingly attached at each end to a jamb. During a blowing rainstorm, water is contained by the dam and directed to a contain-and-drain water management system, which directs the water away from the doorway to an exterior weep hole or other drain port. The fin, being flexible, yields to the weight of a footstep or a wheelchair thereby maintaining the handicap accessible designation of the sill and the doorway.