Flooding is no longer a rare, once-in-a-decade event. From sudden flash floods to seasonal storms, communities across the U.S. are witnessing rising waters with increasing regularity. Whether you’re a homeowner, business owner, or a municipal official, the urgency to rethink flood preparedness has never been greater.
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In an era marked by rapid climate change, aging infrastructure, and more intense weather patterns, traditional flood control methods are proving to be outdated. It’s time for a modern flood control barrier solution — one that combines portability, strength, and smart design — to help people stay ahead of the next flood event.
Flooding is the most common and costliest natural disaster in the United States. It’s not just coastal regions at risk — inland communities near rivers, lakes, and even poorly drained urban areas are also vulnerable.
Some key reasons why flooding is becoming more dangerous:
Climate Change: Warmer temperatures increase the volume and intensity of rainfall, leading to more frequent and severe flooding.
Urbanization: As cities grow, impermeable surfaces like pavement and concrete prevent proper water absorption.
Aging Infrastructure: Storm drains, levees, and dams built decades ago were not designed for today’s weather extremes.
This shifting reality demands more than reactive clean-up efforts — it calls for proactive, adaptable flood defense systems.
For decades, sandbags have been the go-to solution for emergency flood protection. But while they may seem simple and familiar, sandbags come with a long list of limitations:
Slow to Deploy: Filling, stacking, and placing sandbags is time-consuming and labor-intensive — not ideal in the face of rapidly rising water.
Limited Reusability: Once used, sandbags often become contaminated and must be discarded.
Environmental Impact: Wet sandbags can become breeding grounds for mold and bacteria, and disposing of them is a logistical burden.
Ineffectiveness: Sandbags are not watertight. Water can still seep through, especially with long-term exposure.
As floods become faster and more unpredictable, relying on outdated methods puts properties and lives at unnecessary risk.
Temporary flood control barriers provide on-demand protection that can be set up quickly in anticipation of a flood event. For example, Garrison’sMayim Flood Barriers are engineered to be self-stabilizing with the weight of rising water, forming a watertight seal against doors, garages, and low-lying entry points.
Mayim Flood Barriers are easily interconnected to give you the exact right amount of protection you need with the ability to create turns. These barriers can be deployed without specialized tools or labor, making them ideal for:
Homes in flood-prone neighborhoods
Businesses that need short-term seasonal protection
Municipalities looking to protect roadways, transit stations, or critical infrastructure
Their modular design also means they can be reused and repositioned as needed, saving time, money, and stress in future events.
For properties that require long-term protection, installed flood wall systems offer peace of mind. Garrison’sHammerhead Aluminum Flood Wall System, for instance, provides robust flood defense while maintaining a low profile when not in use.
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Hammerhead is the ultimate flood wall system that is 100% manufactured in the USA ensuring high quality and the utilization of -T6 Aluminum. Our engineered flood wall system is built to withstand high water pressure and can be customized to fit a variety of entry points, including:
Commercial storefronts
Government buildings
Residential complexes
Critical infrastructure like hospitals or data centers
Unlike sandbags or makeshift solutions, these permanent flood walls integrate with a property’s architecture and can be deployed within minutes during an emergency.
Waiting until floodwaters are at your doorstep is not a viable plan. The most effective flood mitigation strategies are put in place before the weather turns dangerous. Early preparedness can:
Prevent property damage and reduce insurance claims
Ensure business continuity by keeping operations running during storms
Protect critical infrastructure and reduce emergency response costs
Keep families safe and reduce the emotional toll of displacement
Many communities are beginning to shift their mindset from disaster response to disaster resilience — and the adoption of modern flood barriers is a major step in that direction.
In the USA you can check FEMA /FIRM (Flood Insurance Rate Maps) floodmaps for your area on the FEMA website.
If you need more detailed information then you will need to undertake a Flood Risk Assessment of your site. As well as giving details of the likelihood and severity of any likely flooding these can also suggest ways to manage / minimise your risk.
Extreme rainfall events are increasing and river levels are likely to rise in the future during these events. To protect a site against river flooding this would normally mean building a bank or a wall to keep the river in its channel. Where this is visually unacceptable then glass floodwalls are a good flood defence solution, as they keep a ‘connection’ to the river in normal times, and can protect without human intervention should river levels rise. If there is a bank or wall with access points through it, these can be protected with demountable flood barriers or floodgates that are shut in advance of the flood.
There are many factors that are used to determine the best flood protection solution for a site. Cost / warning time and manpower availability / aesthetics / allowable leakage rates / geometry/ space limitations of your site / frequency of operation. The ration of importance of all of these is different for every site, and so there is not one ‘best’ type of solution. FCI work hard with clients to determine what is best for each and every project.
There are several standards across the world that will give ‘allowable leakage rates’ for all types of flood barrier. Generally there is a differentiation between ‘temporary barriers’ which are not location specific and are asked to work on a variety of ground surfaces. These often have a leakage rate of 300 litres/metre/hr (24 gals/ft/hr), and will often need pumps behind them to throw the water back over the barrier.
Next there are ‘perimeter floodgates or barriers’ which are generally around the outside of a building. You can imagine it will be raining on both sides of these barriers during a flood event and so a mid-way leakage rate is allowed for of 40 litres/ metre/hr (3 gals/ft/hr).
Finally, for flood doors that may be keeping ‘the carpet dry’ there is the tightest leakage rate of 1 litre/metre/hr (0.08gals/ft/hr).
Ultimately each client will have different requirements, and the correct allowable rate can be calculated with site specific parameters.