Sandbags and water inflated tubing can be used to fill gaps in a permanent protection system, to raise an existing levee or to build a complete emergency levee. Sandbags alone, when filled and stacked properly, can hold back flood water, but they are most effective when used with polyethylene (plastic) sheeting.
More on sandbagging.
Water-inflated dams are available in heights from 2 feet to 6 feet and must be designed or installed so they do not roll or slide.
More on water-inflatables.
Plastic sheeting can be used against the outside walls of a building to provide temporary protection (wrapping) similar to dry floodproofing. The plastic can be supported on structures built out from the building, so landscaping around the building is not displaced and the building does not feel the force of water on its walls.
More on wraps and temporary shields
Also visit the Back-flow and Panels rooms of the Mall.