Flood history · Geismar, LA 70734
Flood insurance claims in Geismar, LA 70734
123 claims since 1979 and $3.8 million paid. Here's what the public record shows, and how to check a specific address.
Claims by year
Every NFIP flood insurance claim reported in ZIP 70734 since 1978.
What the record says
About 34% of claims here were on properties rated outside high-risk zones (zones X, B or C). A lower-risk zone on the map is not a guarantee.
Losses are spread across many events; the largest, Mid-summer severe storms, accounts for 37% of claims.
25 claims were filed in the last 10 years.
The most commonly recorded cause is heavy rain or snowmelt collecting faster than it drains, which can happen far from any river or coast.
Ascension Parish* takes part in FEMA's Community Rating System (class 7), which can lower flood insurance premiums by up to 15% in high-risk zones.
Biggest flood events
| Event | Year | Claims | Share |
|---|---|---|---|
| Mid-summer severe storms | 2016 | 45 | 37% |
| 2021 Mid-Spring Severe Storms | 2021 | 18 | 15% |
| Hurricane Isaac | 2012 | 5 | 4% |
| Hurricane Katrina | 2005 | 3 | 2% |
| Hurricane Ida | 2021 | 3 | 2% |
| Tropical Storm Allison | 2001 | 3 | 2% |
Flood zone at time of claim
NFIP communities
Federal disaster declarations in Ascension County
Flood, hurricane and storm declarations since 2000.
31 flood, storm or hurricane declarations for Ascension County since 2000.
Check a specific address in Geismar.
ZIP-level history is the backdrop. See the official FEMA flood zone, ground elevation and next steps for one property, free.
Nearby Louisiana ZIP codes
Sources: FEMA OpenFEMA NFIP Redacted Claims (v3) and Disaster Declarations Summaries, FEMA NFIP Community Status Book; place names from GeoNames (CC BY 4.0). Data as of 2026-10-09. Payments are net building + contents payments in dollars at the time paid, not adjusted for inflation. Claims are grouped by the ZIP code reported on the claim. This product uses the FEMA OpenFEMA API but is not endorsed by FEMA. Information only; not an official flood zone determination or insurance advice.
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