Gulf hurricanes drive the majority of outage events, with recovery timelines measured in days rather than hours.
Louisiana backup planning should assume transmission-scale hurricane damage and restoration timelines measured in weeks, not just a one-night bridge load.
Gulf Storm and Flood Exposure
Louisiana's outage risk is shaped by a single utility's dominance across the most hurricane-exposed corridors in the state. Entergy Louisiana and Entergy New Orleans together serve roughly 1.3 million of the state's 2.5 million electricity customers. When Hurricane Ida struck in August 2021, all eight high-voltage transmission lines feeding the greater New Orleans area went out of service simultaneously. That total transmission failure disconnected the city from the bulk electric grid for days.
Across Entergy's Louisiana territory, customer outages peaked at roughly 902,000. Damage assessments eventually tallied more than 30,000 destroyed or damaged utility poles, more than hurricanes Katrina, Ike, Delta, and Zeta combined. Hardest-hit coastal parishes like Lafourche and Terrebonne did not reach full restoration until September 29, a full 31 days after landfall.
For backup sizing, the transmission-level failure pattern matters most. When the entire feed into a metro area goes dark, restoration timelines are measured in weeks, not days. Portable stations in southeast Louisiana should be sized for sustained multi-week runtime with solar recharge factored in from day one.
Federal disaster declaration for Category 4 hurricane causing catastrophic wind and flood damage across southeastern Louisiana.
Source: FEMA DR-4611Federal disaster declaration for Category 4 hurricane causing major wind damage in southwestern Louisiana.
Source: FEMA DR-4559Evidence trail
These notes trace the editorial claims above back to FEMA, DOE, utility, or other cited records.
FEMA declaration count (35) from OpenFEMA API, deduplicated by disaster number, DR/EM/FM types, 2014-2023.
NRI composite score (86.2) from FEMA NRI county layer, population-weighted to state level.
Hurricane Ida DR-4611 and Hurricane Laura DR-4559 from FEMA disaster declaration records.
Entergy customer base (1.3M of 2.5M LA customers): EIA todayinenergy detail #49556 (2021-09).
Ida transmission failure (8 lines, 902K outages): Entergy Storm Center, Aug 30 2021 update.
Ida infrastructure damage (30K poles, 31-day restoration): Entergy Newsroom (2021-09).
Structured FEMA NRI, HHS emPOWER, NOAA Storm Events, and EIA methodology is documented separately on the methodology page.
NRI hurricane score of 92.3 reflects high modeled exposure, consistent with the FEMA declaration pattern.
NOAA storm-event records filtered to outage-relevant event types for Louisiana. Counts reflect historical storm-event assignments, not confirmed utility outages.
Analysis window
2005-01 to 2024-12
Included storm-event records
10,249
Source as of
2026-03
Included exact NOAA event types for Louisiana: Hurricane (Typhoon), Tropical Storm, Tropical Depression, Thunderstorm Wind, Tornado, High Wind, Strong Wind, Flash Flood, Flood, Storm Surge/Tide, Winter Storm, Ice Storm, Freezing Rain.
In this filtered NOAA record set for Louisiana, Apr has the highest monthly count (1,619 records) , and Thunderstorm Wind is the leading event type. This chart shows frequency in NOAA records, not how severe a specific outage may be.
89 events were not mapped to a county ranking.
64 events were not mapped to a county ranking.
83 events were not mapped to a county ranking.
96.1% of listed records were matched directly to this county.
94.9% of listed records were matched directly to this county.
96.7% of listed records were matched directly to this county.
93.7% of listed records were matched directly to this county.
99.7% of listed records were matched directly to this county.
94.5% of listed records were matched directly to this county.
With the current Louisiana NWS county crosswalk, mapped forecast zones are effectively 1:1 with counties; unresolved legacy or coastal forecast zones fall into the excluded bucket.
Direct county match
87.1%
Mapped from forecast zone
10.0%
Not assigned to county ranking
2.9%
Unresolved forecast zones
16
County-level HHS emPOWER counts for electricity-dependent Medicare beneficiaries in Louisiana.
43,851 Medicare beneficiaries in Louisiana have claims associated with electricity-dependent medical equipment. (HHS emPOWER, 2026-03)
County-level HHS emPOWER records for this state. Medicare enrollment data only. 64 counties are included in this state snapshot.
Smaller Medicare base; interpret this percentage with extra caution.
Counties with higher concentrations may face elevated community-level demand for backup power during outages. This does not indicate individual medical necessity.
Limitations: Reflects Medicare beneficiaries with claims associated with electricity-dependent medical equipment. Does not capture non-Medicare or uninsured populations. HHS masks cells from 1 to 10 as 11.
The GeneratorChecker Backup Priority Index is a county shortlist for backup planning, combining historically frequent outage-relevant storm activity with larger county counts of electricity-dependent Medicare beneficiaries. It is planning context, not a forecast or an outage guarantee.
BPI version
v1.0
Analysis window
2005-01 to 2024-12
Matched counties
64
Counties qualify for the public BPI only when both signals land at or above the 80th percentile within the state. The shortlist excludes low-base medical counties and counties with less than 30% direct NOAA county matching.
Qualifying counties shown on the page: 5.
Percentiles are computed within Louisiana only and are not comparable across states.
1. CADDO
County FIPS 22017
At-risk Medicare count
2,669
Storm-event records
715
Direct NOAA county match
96.1%
2. ST. TAMMANY
County FIPS 22103
At-risk Medicare count
2,599
Storm-event records
334
Direct NOAA county match
96.7%
3. EAST BATON ROUGE
County FIPS 22033
At-risk Medicare count
2,659
Storm-event records
243
Direct NOAA county match
93.8%
4. CALCASIEU
County FIPS 22019
At-risk Medicare count
1,642
Storm-event records
312
Direct NOAA county match
99.7%
5. OUACHITA
County FIPS 22073
At-risk Medicare count
1,620
Storm-event records
319
Direct NOAA county match
93.7%
State-level utility structure from official EIA Form 861 data, shown as planning context alongside the weather and medical layers.
Data year
2024
Utilities in scope
20
Residential customers represented
2,110,185
95.4% of in-scope residential customers in Louisiana are served by utilities that report complete annual SAIDI and SAIFI pairs to EIA for 2024, excluding major event days.
GeneratorChecker does not blend statewide SAIDI or SAIFI values across IEEE and Other Standard reporters in this public layer.
This block identifies the utility structure behind the state, but it does not score your local grid reliability.
IOU
IOU
IOU
IOU
Cooperative
Bias your plan toward hurricane-season runtime and recharge resilience.
Critical loads to sustain a household through a multi-day hurricane outage: refrigeration, medical, communications, and air circulation.
Load
421W
Target
72h
Minimum
49,900 Wh
Solar recharge is essential at this duration. Use the solar charge time tool to match panel output to your station.
Size this scenario in calculatorExtended coverage for the restoration phase after the storm passes, adding work-from-home capability.
Load
725W
Target
120h
Minimum
143,000 Wh
Requires expandable battery system or aggressive load rotation with solar top-up.
Size this scenario in calculatorCritical Note: No single portable power station in our database covers the full 72-hour baseline at this load (49,900 Wh target vs. 6,144 Wh max in our current database). Use solar recharge, load rotation, or expandable systems for longer events.
Planning backup around average usage instead of storm-season critical loads.
Not separating critical circuits from high-draw comfort devices during long outages.
Running without a documented recharge strategy when grid restoration can be delayed.
Average hurricane outage lasts 3-7 days. Here's exactly what to run, how much battery you need, and which power stations handle a fridge + phone + fan.
A 1/2 HP sump pump surges to 3,243W at startup. Here is how to size a power station that will not trip when it matters most.
For home backup, you need surge capacity for fridge compressors and enough Wh for multi-day outages. Here are the best options from our database of 33 stations.
Composite score: 86.2 / 100
Rating: Relatively High
Top modeled hazards: Hurricane, Heat Wave, Lightning
Hurricane score: 92.3
Winter Weather score: 53.5
Wildfire score: 47.9
Total (2014-2023): 35
Most recent: 2023-09-27 Other
| Type | Count |
|---|---|
| Hurricane | 13 |
| Flood | 7 |
| Fire | 4 |
| Biological | 3 |
| Coastal Storm | 3 |
| Severe Ice Storm | 2 |
| Other | 1 |
| Severe Storm | 1 |
| Tornado | 1 |
Required Wh = (Total Load W × Target Hours / Inverter Derate) × Safety Factor
Inverter derate: 0.70 (30% real-world loss)
Safety factor: 1.15
Rounding: Up to nearest 100 Wh
Louisiana has an NRI composite risk score of 86.2 (Relatively High), with 35 federal declarations from 2014 to 2023. NRI hurricane score of 92.3 reflects high modeled exposure, consistent with the FEMA declaration pattern.
For the primary scenario on this page (72-hour storm shelter), the estimated minimum is 49,900 Wh for a 72-hour target. Refine this in the calculator with your actual devices.
NRI is a modeled risk index based on hazard exposure, vulnerability, and expected loss. FEMA declarations reflect federally declared incidents. They answer different questions — use both signals together for planning.
Overloading a single station with non-essential appliances during the first 24 hours of an outage. See the common mistakes section above for more state-specific pitfalls.
