Flood insurance premiums are calculated based upon geographic maps setting forth the boundaries for various flood zones.
Because most property insurance policies covering property at fixed locations exclude flooding, flood insurance must be purchased separately. In 1969, Congress created the National Flood Insurance Program to administer the sale of flood insurance. National flood insurance is available directly from the Federal Insurance Administration or through hundreds of private insurers who participate in federal insurance programs. The Federal Emergency Management Agency (FEMA) reinsurers private companies against flood losses.
Contract claims must be filed in federal court, and are subject to strict requirements of the policy and federal law. Insureds still have the right in the Fifth Circuit to bring suit on extra-contractual claims under state law against a flood insurer, according to the 1993 opinion, Spence v. Omaha Indem. Ins. Co. It should be noted that there is a disagreement in this area as to whether the National Flood Insurance Act of 1968, preempts state law in this area.