A flood barrier comprising: at least two supporting posts for positioning at an entrance of a building; and at least one panel removably arranged intermediate a pair of the supporting posts to form the flood barrier, wherein the panel includes a first plurality of seals arranged at first opposing edges of the panel and a second plurality of seals arranged at second opposing edges of the panel, the first plurality of seals and the second plurality of seals having corrugated surfaces; characterized in that: the first plurality of seals are arranged to interface with the supporting posts and one of the second plurality of seals is arranged to interface with a floor of the entrance to provide, upon compression of the first plurality of seals and the second plurality of seals, a water-tight arrangement against entry of flood waters into the building; and the flood barrier further comprises a pair of fasteners arranged to removably secure the at least one panel to the at least two supporting posts, the pair of fasteners being at a topmost position of the at least one panel and operable between an unlocked position and a locked position, wherein in the locked position the fasteners are arranged to secure the at least one panel to the at least two supporting posts and to exert a force downwardly on the at least one panel in a direction towards the floor of the entrance so as to compress the one of the second plurality of seals to provide the water-tight arrangement. at least two supporting posts for positioning at an entrance of a building; and at least one panel removably arranged intermediate a pair of the supporting posts to form the flood barrier, wherein the panel includes a first plurality of seals arranged at first opposing edges of the panel and a second plurality of seals arranged at second opposing edges of the panel, the first plurality of seals and the second plurality of seals having corrugated surfaces; characterized in that: the first plurality of seals are arranged to interface with the supporting posts and one of the second plurality of seals is arranged to interface with a floor of the entrance to provide, upon compression of the first plurality of seals and the second plurality of seals, a water-tight arrangement against entry of flood waters into the building; and the flood barrier further comprises a pair of fasteners arranged to removably secure the at least one panel to the at least two supporting posts, the pair of fasteners being at a topmost position of the at least one panel and operable between an unlocked position and a locked position, wherein in the locked position the fasteners are arranged to secure the at least one panel to the at least two supporting posts and to exert a force downwardly on the at least one panel in a direction towards the floor of the entrance so as to compress the one of the second plurality of seals to provide the water-tight arrangement. the first plurality of seals are arranged to interface with the supporting posts and one of the second plurality of seals is arranged to interface with a floor of the entrance to provide, upon compression of the first plurality of seals and the second plurality of seals, a water-tight arrangement against entry of flood waters into the building; and the flood barrier further comprises a pair of fasteners arranged to removably secure the at least one panel to the at least two supporting posts, the pair of fasteners being at a topmost position of the at least one panel and operable between an unlocked position and a locked position, wherein in the locked position the fasteners are arranged to secure the at least one panel to the at least two supporting posts and to exert a force downwardly on the at least one panel in a direction towards the floor of the entrance so as to compress the one of the second plurality of seals to provide the water-tight arrangement.