Rensselaer County, New York Natural Disaster Risk
FEMA National Risk Index assessment · NY
MediumComposite Risk Score
National percentile: 82th
Rensselaer County faces medium composite natural disaster risk (NRI Risk Index score 82.2, 82th national percentile), driven primarily by hail and riverine flood exposure. Expected annual loss across all 18 hazard types is $49M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
Overall natural disaster risk in Rensselaer County is medium, with a National Risk Index score of 82.2 out of 100 — placing it in the 82nd national percentile and near the national midpoint for natural-disaster risk. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Risk here concentrates in hail (ice stones from severe thunderstorms that damage property and crops) at Medium risk — $2M in expected annual loss and about 2.85 events per year; riverine flood (rivers and streams overflowing their banks after heavy rain or snowmelt) at Medium risk — $37M in expected annual loss and about 2.29 events per year; and lightning (electrical discharges from storms that ignite fires and cause casualties) at Medium risk — $756K in expected annual loss and about 26.69 events per year. Across all hazards, FEMA estimates $49M in expected annual loss for a population of 161K.
Beyond physical exposure, Rensselaer County has a low 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.
History supports the rating: Rensselaer County has received 29 federal disaster declarations since 1973, including 10 for severe storm events and 6 for hurricane events. The most recent was Hurricane Henri (hurricane), declared in August 2021.
Among 62 New York counties, Rensselaer County ranks #22 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Hail | Medium | 2.85 / yr | $2M |
| Riverine Flood | Medium | 2.29 / yr | $37M |
| Lightning | Medium | 26.69 / yr | $756K |
| Hurricane | Low | 0.06 / yr | $2M |
| Strong Wind | Medium | 1.44 / yr | $1M |
| Tornado | Medium | 0.15 / yr | $3M |
| Landslide | Low | 0.80 / yr | $8K |
| Ice Storm | Medium | 0.84 / yr | $240K |
| Winter Weather | Medium | 16.85 / yr | $114K |
| Earthquake | Low | 0.00 / yr | $568K |
| Heat Wave | Low | 2.97 / yr | $549K |
| Cold Wave | Low | 2.51 / yr | $1M |
| Avalanche | Very Low | 0.01 / yr | $302 |
| Wildfire | Very Low | 0.00 / yr | $14K |
| 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
Rensselaer County has received 29 federal disaster declarations since 1973, most recently Hurricane Henri in August 2021. Most frequent causes: Severe Storm (10), Hurricane (6), Snowstorm (5).
| Declared | Type | Disaster |
|---|---|---|
| August 2021 | Hurricane | Hurricane Henri |
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| July 2017 | Snowstorm | Severe Winter Storm and Snowstorm |
| October 2012 | Hurricane | Hurricane Sandy |
| September 2011 | Severe Storm | Remnants of Tropical Storm Lee |
| August 2011 | Hurricane | Hurricane Irene |
| February 2011 | Severe Storm | Severe Winter Storm and Snowstorm |
| March 2009 | Severe Storm | Severe Winter Storm |
| December 2008 | Severe Storm | Severe Winter Storm |
Showing the 10 most recent of 29 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Rensselaer County?
Rensselaer County has a composite FEMA National Risk Index score of 82.2 out of 100, placing it in the Medium category and the 82th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Rensselaer County?
The three highest-rated hazards are Hail (Medium, $2M EAL), Riverine Flood (Medium, $37M EAL), Lightning (Medium, $756K EAL). These account for most of the county's expected annual losses.
How does Rensselaer County compare to other New York counties?
Rensselaer County ranks #22 of 62 New York counties for overall natural disaster risk, with a medium rating.
How many federally declared disasters has Rensselaer County had?
FEMA records 29 federal disaster declarations for Rensselaer County since 1973, most often 10 for severe storm events and 6 for hurricane events. The most recent was Hurricane Henri, declared in August 2021.
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. Rensselaer County's $49M EAL is a statistical average, not a guarantee for any specific year or address.