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General Flood

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1. What do I need to know if my building is in the floodplain?

Buildings in special flood hazard areas shown on Flood insurance Rate Maps (FIRMs) may be damaged when flooding occurs. Some buildings flood frequently, while others get damaged by only the more severe events.

If your home is in the 1% annual chance floodplain, it has a 26% chance of getting flooded over a 30-year period. This means it is about five times more likely to get damaged by flood than by a severe fire.

You should know that usually you can get flood insurance, if available, by contacting your regular homeowners insurance agent. FEMA and others recommend that everyone in special flood hazard areas buy flood insurance. If you buy a home or refinance your home, your mortgage lender or banker may require flood insurance. But, even if not required, it is a good investment especially in areas that flood frequently or where flood forces are likely to cause major damage.

Another thing you should know is that your community may require permits for remodeling, improving, expanding, or rebuilding your building. In order to reduce long-term flood damage, the National Flood Insurance Program requires that buildings that are substantially improved or substantially damaged become compliant.

This means if the cost of the improvements or repairs is more than 50% of the market value of the building, you will have to make it compliant with the rules for floodplain construction. Usually, this means lifting it off the foundation and elevating it above the predicted flood level. If you carry a flood insurance policy and have major flood damage, you may be eligible for up to $20,000 more to help pay for the cost of this work.

2. What documents does FEMA need from my insurance company?

If you apply for help from FEMA because your insurance does not cover all of your disaster related needs, you need to write a letter to FEMA explaining your situation and include a copy of a settlement or denial letter from your insurance company. FEMA cannot duplicate any insurance coverage.

3. What is a flood?

A flood is defined in the Standard Flood Insurance Policy (SFIP), in part, as a general and temporary condition of partial or complete inundation of two or more acres of normally dry land area or of two or more properties (at least one of which is your property) from overflow of inland or tidal waters, from unusual and rapid accumulation or runoff of surface waters from any source, or from mudflow.

4. What is a Special Flood Hazard Area?

In support of the National Flood Insurance Program (NFIP), FEMA has undertaken a massive effort of flood hazard identification and mapping to produce Flood Hazard Boundary Maps (FHBMs), Flood Insurance Rate Maps (FIRMs), and Flood Boundary and Floodway Maps (FBFMs).

Several areas of flood hazards are commonly identified on these maps. One of these areas is the Special Flood Hazard Area (SFHA), which is defined as an area of land that would be inundated by a flood having a 1% chance of occurring in any given year (also referred to as the base flood or 100-year flood). The 1% annual chance standard was chosen after considering various alternatives.

The standard constitutes a reasonable compromise between the need for building restrictions to minimize potential loss of life and property and the economic benefits to be derived from floodplain development. Development may take place within the SFHA, provided that development complies with local floodplain management ordinances, which must meet the minimum federal requirements. Flood insurance is required for insurable structures within the SFHA to protect federal financial investments and assistance used for acquisition and/or construction purposes within communities participating in the NFIP.

5. What is a Flood Insurance Study (FIS)?

A Flood Insurance Study (FIS) is a book that contains information regarding flooding in a community and is developed in conjunction with the Flood Insurance Rate Map (FIRM). The FIS, also known as a flood elevation study, frequently contains a narrative of the flood history of a community and discusses the engineering methods used to develop the FIRMs. The study also contains flood profiles for studied flooding sources and can be used to determine base flood elevations for some areas.

6. What elevation is used when rating a structure for a flood insurance policy?

The difference between the lowest floor elevation (including basement) of your structure and the 1% annual chance flood elevation is used to determine the insurance rating.

Note: Buildings and structures are insurable. The National Flood Insurance Program does not insure land.

7. What is earthen fill and how does it affect the floodplain?

For purposes of the National Flood Insurance Program (NFIP), fill refers to soil that is used to raise the level of the ground. Depending on where the soil is placed, fill may change the flow of water or increase flood elevations. Fill may be used to elevate a building to meet the NFIP requirements. Sometimes fill is combined with other methods of elevation such as pilings or foundation walls. Placement of fill in the Special Flood Hazard Area requires a local permit from the community.

If fill has been added and removes a structure or property from a floodplain, you may file for a Letter of Map Revision-based on Fill to consider the elevations.

8. What is an elevation certificate?

A community’s permit file must have an official record that shows new buildings and substantial improvements in all identified Special Flood Hazard Areas (SFHAs) are properly elevated. This elevation information is needed to show compliance with the floodplain management ordinance.

FEMA encourages communities to use the Elevation Certificate developed by FEMA to fulfill this requirement since it also can be used by the property owner to obtain flood insurance. Communities participating in the Community Rating System (CRS) are required to use the FEMA Elevation Certificate.