While big storms command attention, a "no name" storm lasting for hours or days can bring as much or more floodwater than a named tropical system or hurricane.
Why Floods Happen
Our climate is primarily humid subtropical, with two seasons: the five-month rainy season, from June through October, when 70% of the year's rain falls, and most hurricanes occur; and the seven month dry season, from November through May. Nature does not always strictly follow this calendar, but knowing that we can expect two seasons; one with almost daily rain and the other much dryer -- is a key lesson for living in southern and central Florida.
Flood Smart - a FEMA web site that helps homeowners prepare for flooding, and assess their flood risks.
Many new residents are alarmed when they see standing water in streets or driveway swales. In other places, that could be a cause for concern, but in our region, it's something you can expect to see after a soaking summer shower.
Our region was, less than 100 years ago, a wetlands studded peninsula which remained wet for most of the year, with the exception of a slightly higher system of coastal ridges, acting like the sides of a bowl to keep water stored in inaccessible inland swamps.
Today, most of our population lives atop land which was once wet throughout the year. Paved lands and development have dramatically reduced water storage. Where the land is undeveloped, our flat, sandy soils are quickly saturated by rain. Together, these changes to the landscape mean stormwater can quickly deepen, which at times can only be lowered by making "wasteful" freshwater discharges to tide.
Flood Zone Questions
This information is gathered for your use by your county, and by some cities. In most cases, you'll probably need to go to a county office -- though some may have maps or access to flood zone information on their web site.
Flood Smart - a FEMA web site that helps homeowners prepare for flooding, and assess their flood risks.
Making Systems Work Better
Individuals can also play a part, by learning how the interconnected systems work.
"Know the Flow" - a brochure describing how local/neighborhood, secondary and regional water management systems work, and offering residents tips for checking/maintaining their neighborhood drainage system. Know the Flow [PDF]
EOC
