Essex County, New York Natural Disaster Risk
FEMA National Risk Index assessment · NY
LowComposite Risk Score
National percentile: 63th
Essex County faces low composite natural disaster risk (NRI Risk Index score 62.7, 63th national percentile), driven primarily by landslide and avalanche exposure. Expected annual loss across all 18 hazard types is $21M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
FEMA's National Risk Index rates Essex County at low composite risk, with a National Risk Index score of 62.7 out of 100 — placing it in the 63rd national percentile and below the national average for natural-disaster risk. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Most of Essex County's expected losses come from landslide (downhill movement of rock, soil, and debris on unstable slopes) at High risk — $538K in expected annual loss and about 4.01 events per year; avalanche (fast-moving snow and debris sliding down steep mountain slopes) at Medium risk — $457K in expected annual loss and about 0.03 events per year; and lightning (electrical discharges from storms that ignite fires and cause casualties) at Medium risk — $680K in expected annual loss and about 22.77 events per year. Across all hazards, FEMA estimates $21M in expected annual loss for a population of 37K.
Beyond physical exposure, Essex County has a medium social vulnerability rating (how susceptible the population is to harm) and a very high community resilience rating (its capacity to prepare for and recover from disasters). A less vulnerable population paired with strong resilience helps the community absorb and recover from events.
The county's disaster history tells the same story: Essex County has received 25 federal disaster declarations since 1993, including 7 for severe storm events and 4 for flood events. The most recent was Remnants of Tropical Storm Debby (tropical storm), declared in September 2024.
Among 62 New York counties, Essex County ranks #40 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Landslide | High | 4.01 / yr | $538K |
| Avalanche | Medium | 0.03 / yr | $457K |
| Lightning | Medium | 22.77 / yr | $680K |
| Riverine Flood | Medium | 3.07 / yr | $16M |
| Ice Storm | Medium | 0.24 / yr | $265K |
| Earthquake | Low | 0.00 / yr | $868K |
| Winter Weather | Medium | 20.55 / yr | $111K |
| Hurricane | Low | 0.02 / yr | $339K |
| Cold Wave | Low | 4.96 / yr | $919K |
| Strong Wind | Low | 0.85 / yr | $334K |
| Heat Wave | Very Low | 0.82 / yr | $128K |
| Wildfire | Very Low | 0.00 / yr | $9K |
| Tornado | Very Low | 0.11 / yr | $298K |
| Hail | Very Low | 1.17 / yr | $37K |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Disaster History
Essex County has received 25 federal disaster declarations since 1993, most recently Remnants of Tropical Storm Debby in September 2024. Most frequent causes: Severe Storm (7), Flood (4), Hurricane (4).
| Declared | Type | Disaster |
|---|---|---|
| September 2024 | Tropical Storm | Remnants of Tropical Storm Debby |
| August 2024 | Flood | Severe Storm, Tornadoes, and Flooding |
| July 2023 | Severe Storm | Severe Storms and Flooding |
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| December 2019 | Severe Storm | Severe Storms, Straight-Line Winds, and Flooding |
| July 2017 | Snowstorm | Severe Winter Storm and Snowstorm |
| July 2013 | Flood | Severe Storms and Flooding |
| October 2012 | Hurricane | Hurricane Sandy |
| August 2011 | Hurricane | Hurricane Irene |
Showing the 10 most recent of 25 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Essex County?
Essex County has a composite FEMA National Risk Index score of 62.7 out of 100, placing it in the Low category and the 63th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Essex County?
The three highest-rated hazards are Landslide (High, $538K EAL), Avalanche (Medium, $457K EAL), Lightning (Medium, $680K EAL). These account for most of the county's expected annual losses.
How does Essex County compare to other New York counties?
Essex County ranks #40 of 62 New York counties for overall natural disaster risk, with a low rating.
How many federally declared disasters has Essex County had?
FEMA records 25 federal disaster declarations for Essex County since 1993, most often 7 for severe storm events and 4 for flood events. The most recent was Remnants of Tropical Storm Debby, declared in September 2024.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Essex County's $21M EAL is a statistical average, not a guarantee for any specific year or address.