Abstract: A flood gate is provided that includes a frame defining a fluid passageway, a door pivotally mounted in the frame for movement between a plurality of open positions to permit flow of fluid therethrough, and at least one latching mechanism for holding the door in the closed position. The latching mechanism can release the door when the fluid force meets a preset level, by floatation, or by flow actuation. In addition, the latching mechanism can reset the door to the closed position when the fluid force acting on the door drops below the preset level. The door can include a ventilation opening, an automatic louver assembly for controlling air flow through the ventilation opening and a screen covering the ventilation opening. The flood gate may include a retention mechanism for preventing the door from opening when the structure in which the flood gate is mounted, such as an overhead garage door is rotated or otherwise moved.