Apparatuses and methods for securing a door. The apparatuses include a door clamp having a stop, a base attached to the stop, a jamb bracket attached to the base, and a fastener coupled to the jamb bracket. In one embodiment, the apparatus includes first and second jamb brackets attached at a hinge, a handle attached coaxially with the hinge, first and second bases extending from the jamb brackets, and first and second stops attached to the bases.