Jefferson Parish, Louisiana: hazard risk
FEMA rates Jefferson Parish's overall risk Relatively High (score 98.7 of 100, higher than 98% of rated U.S. counties); 9 of its 15 hazards are rated Relatively High or Very High, led by hurricane, lightning, coastal flooding. Its storm record holds 768 events since 1950.
FEMA's rating for each hazard
These are FEMA's county-wide model ratings and this county's storm record. They are not an assessment of any property, address or building, and not insurance advice: a property's risk depends on its own elevation, construction and location.
FEMA gives each hazard its own rating, and a rating does not follow the score from one hazard to the next: a hazard with a higher score can carry a lower rating than another. The table sorts by FEMA's rating, then by score (0 to 100, the county against every other county for that hazard).
| Hazard | Risk rating | Score | Expected annual loss |
|---|---|---|---|
| Hurricane | Very High | 99.8 | $251M |
| Lightning | Very High | 98.6 | $3.1M |
| Coastal Flooding | Very High | 95.6 | $11M |
| Heat Wave | Relatively High | 97.5 | $9.9M |
| Cold Wave | Relatively High | 96.5 | $12M |
| Hail | Relatively High | 96.4 | $3.1M |
| Riverine Flooding | Relatively High | 96.0 | $76M |
| Ice Storm | Relatively High | 89.7 | $760K |
| Winter Weather | Relatively High | 85.6 | $242K |
| Tornado | Relatively Moderate | 72.2 | $2.3M |
| Strong Wind | Relatively Moderate | 63.5 | $674K |
| Earthquake | Relatively Low | 78.0 | $1.2M |
| Drought | Relatively Low | 50.0 | $122K |
| Landslide | Very Low | 28.1 | $219 |
| Wildfire | Very Low | 27.3 | $10K |
Source: FEMA National Risk Index, December 2025 release. A model of future loss, not a count of past events. FEMA's National Risk Index map.
What the record holds
| Hazard | Records | Deaths | Damage | Rank in state | Rank in U.S. |
|---|---|---|---|---|---|
| Severe thunderstorm wind | 227 | 3 | $3.3M | 3rd of 64 | 210th of 3,080 |
| Hurricanes and tropical storms | 114 | 32 | $4.4B | 3rd of 64 | 5th of 1,849 |
| Floods | 111 | 0 | $49M | 2nd of 64 | 102nd of 3,080 |
| Hail | 75 | 0 | $111M | 9th of 64 | 510th of 3,080 |
| Heat | 71 | 1 | $122K | 22nd of 64 | 334th of 3,076 |
| Tornadoes | 66 | 4 | $218M | 1st of 64 | 3rd of 3,080 |
| Drought | 33 | 0 | $840K | 21st of 64 | 1020th of 3,063 |
| Lightning | 16 | 4 | $623K | 2nd of 64 | 91st of 3,080 |
| Winter storms | 14 | 1 | – | 36th of 64 | 2642nd of 3,077 |
| High wind and dust storms | 11 | 0 | $25K | 3rd of 64 | 1811th of 3,080 |
| Extreme cold | 10 | 1 | – | 10th of 64 | 1527th of 3,076 |
| Heavy rain | 9 | 0 | – | 2nd of 64 | 390th of 3,080 |
| Rip currents and high surf | 3 | 3 | – | 5th of 64 | 107th of 2,080 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Jefferson Parish record: every hazard by year and month, the deadliest events and FEMA's declarations.