271 flood insurance claims·$3.4M paid·19 federal flood & hurricane disasters
Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.
Shaded areas are FEMA’s mapped flood hazard zones in and around LaSalle Parish, Louisiana. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.
Flash flooding driven by severe thunderstorms and stationary weather systems dominates the flood risk profile in LaSalle Parish, accounting for 33 events out of 41 total recorded flood incidents over the last 30 years, alongside 6 tropical storm events and 1 hurricane event. Recent weather patterns illustrate this hazard, such as the upper-level low-pressure system that produced heavy rainfall on May 6, 2025, and the significant banding of heavy showers, thunderstorms, and cell-training that caused flash flooding across the region on August 29, 2025.
National Flood Insurance Program records indicate that property damage impacts vary significantly by zone. Zone A accounts for the majority of claims with 184 filings averaging $14,369 per payout and an average recorded water depth of 9 inches. Properties located in Zone X unshaded recorded 15 claims with an average payout of $14,688 and an average water depth of 15 inches, while Zone X properties recorded 5 claims with a higher average payout of $134,429 and an average water depth of 16 inches. An additional 67 claims were filed under an unknown zone designation, averaging $6,189 with a 3-inch average water depth.
Homeowners, real estate agents, and journalists should pay the closest attention to properties situated in mapped high-risk Special Flood Hazard Areas such as Zone A, as well as structures located in Zone X zones where lower-frequency flooding has resulted in severe average water depths and substantial insurance payouts.
Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.
8% of LaSalle Parish’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.
199 NFIP claims with a recorded rated flood zone, 1978 to date. The zone is the one FEMA used to rate that policy, which may not match today’s map. Source: OpenFEMA NFIP claims.
In flood insurance claims here that reported a flood depth, the average was 8 inches.
Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.
Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.
The worst year was 1991, with 38 claims and $217,311 paid, the year of Severe Storms, Tornadoes & Flooding.
Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.
26 NOAA storm reports from LaSalle Parish describe what happened, in the words of the forecasters who covered it. Read the Louisiana flood stories →
38 federal disaster declarations since 1973, 19 of them floods, coastal storms or hurricanes.
| Disaster | Began |
|---|---|
| Severe Winter Storm | Jan 23, 2026 |
| Tropical Storm Francine | Sep 10, 2024 |
| Tropical Storm Nicholas | Sep 12, 2021 |
| Hurricane Ida | Aug 26, 2021 |
| Tropical Storm Ida | Aug 26, 2021 |
| Severe Winter Storm | Feb 11, 2021 |
| Severe Winter Storms | Feb 11, 2021 |
| Tropical Storm Zeta | Oct 26, 2020 |
Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.
41 since 1996: 33 flash floods and 1 river or area floods.
| Event | Date | Damage |
|---|---|---|
| Flash Flood | Aug 29, 2025 | — |
| Flash Flood | May 6, 2025 | — |
| Flash Flood | Apr 10, 2024 | — |
| Flash Flood | Nov 9, 2024 | — |
| Flash Flood | Aug 24, 2022 | — |
| Tropical Storm | Aug 27, 2020 | — |
| Flash Flood | Oct 10, 2020 | — |
| Flash Flood | Oct 9, 2020 | — |
— = no damage estimate in the record. Source: NOAA Storm Events Database.
Flash Flood · Aug 29, 2025. Significant banding of heavy showers and thunderstorms with cell-training occurred on the morning of August 29th across East Texas and North Louisiana, posing the threat of flash flooding. A gradual increase in warm air advection and isentropic ascent was noted on the north side of a quasi-stationary frontal boundary and within a very moist and moderately unstable air mass. MUCAPE values ranged from 1000 to 2000 J…
Flash Flood · May 6, 2025. An upper level low pressure system over the Desert Southwest shifted east through the Intermountain West on May 6th, inducing surface low development over West Texas. This also resulted in a tightening pressure gradient across the Southern Plains and Lower Mississippi Valley, with increased southerly low level winds allowing for a warm front to shift north to the I-20 corridor of East Texas and North Louisiana bef…
Flash Flood · Apr 10, 2024. A frontal boundary became stationary across the heart of the Ark-La-Tex region in vicinity of the Interstate 30 corridor on April 8th before slowly advancing southeast on April 9th. Concurrently, very moist southwest flow aloft resulting from a nearly cut-off low across the Desert Southwest provided for precipitable water values near 2 inches. Thunderstorms developed and gradually spread northward from Central…
Flash Flood · Nov 9, 2024. An upper trough slowly shifted east across the Central and Southern Plains on November 9th, behind a nearly stationary frontal boundary that extended from portions of Southeast Texas into Central and Northeast Louisiana. While the forcing ahead of the trough and along the front resulted in numerous showers and thunderstorms which moved repeatedly over the same areas of Central and Southwest Louisiana, additional m…
National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.
Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.
If a building in LaSalle Parish is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.
Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.