St. Charles Parish joined the National Flood Insurance Program Regular Program May 5, 1983. Earlier, FEMA had completed a Flood Study and produced the first Flood Insurance Rate Maps for the parish. The parish adopted the new maps and instituted permitting requirements in the newly identified high-risk areas known as Special Flood Hazard Areas.

Since the parish entered the program, 5,489 flood losses have been reported by policyholders, resulting in more than $90.7 million in payments. Currently, 11,451 policies are in effect in the parish with more than $2.4 billion in coverage. Annual premiums total approximately $5.5 million.

Portions of the flood maps for St. Charles Parish were updated by 1992. New maps for the parish are being prepared using state-of-the-art technology and they will be presented for adoption upon completion.