Geographic Location and Distance from Water: The farther inland you are, typically, the less severe floodwaters might be. In contrast, if you’re closer to bodies of water, storm surges can reach higher levels, requiring taller barriers.

Local Flooding History: Examine past floods in your area, as this history can reveal patterns in water levels during heavy rains or storms. In your case, knowing your backyard tends to flood onto the patio helped you assess the need for a two-foot barrier.

Storm Intensity and Path: Hurricanes like Milton, which threatened your area, bring unpredictable surges. For locations with frequent hurricanes, consider the highest surge levels previously observed.

Room for Safety Margin: Nature is unpredictable, so add a margin above the historically highest flood level in your area.