Do Sandbags Really Stop Flooding? Here's How to Use Them Right

Tropical Storm Bertha's double landfall last week along the Gulf Coast was a reminder of the immense moisture and flooding potential of these types of tropical weather events. Residents in and around New Orleans rushed to fill sandbags to protect from potential flooding. Here is a look at how to properly use sandbags.

How to Properly Fill and Place Sandbags

Sandbags are a useful tool when trying to protect a home or business from shallow flooding. However, the bags only work when they are filled and placed properly along the property. The tool works by redirecting slow-moving shallow water, guiding it into a more protective drainage zone.

Meteorologists warn that residents should never lean on a sandbag for total protection. The bags can become quickly overwhelmed in times of storm surge or rapidly rising flood waters.

The U.S. Army Corps of Engineers notes that people often make the mistake of overfilling the bags. It is important to fill each bag no more than half full. It is a good idea to protect yourself with eye protection and closed-toe shoes when filling and moving sandbags.

Once the bags are appropriately filled with sand, lay them flat and lengthwise so that they are positioned parallel to the predicted water flow direction. Do not forget to tuck the open end underneath the heavy portion of the bag to secure it properly.

Remove rocks, sticks, and other types of debris from the ground before placing the sandbags. It is good to remember that sandbags are not waterproof, making it important to use a heavy plastic sheet against the opening to prevent water from seeping into the bag. In short, the plastic is the water-resistant guard while the weight of the sandbags closes the gaps along the ground.

Emergency officials recommend placing sandbags around the home's most vulnerable entry points. This includes garage doors, basement windows, exterior doors, utility openings, and vents that are close to the ground. Be careful not to inadvertently block storm drains or emergency access routes when placing the sandbags.