Isanti County, Minnesota Natural Disaster Risk
FEMA National Risk Index assessment · MN
Very LowComposite Risk Score
National percentile: 27th
Isanti County faces very low composite natural disaster risk (NRI Risk Index score 26.9, 27th national percentile), driven primarily by wildfire and hail exposure. Expected annual loss across all 18 hazard types is $15M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
Overall natural disaster risk in Isanti County is very low, with a National Risk Index score of 26.9 out of 100 — placing it in the 27th national percentile and among the lowest-risk counties in the country. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Risk here concentrates in wildfire (uncontrolled fires that spread across wildland and into communities) at Low risk — $206K in expected annual loss and about 0.00 events per year; hail (ice stones from severe thunderstorms that damage property and crops) at Low risk — $662K in expected annual loss and about 5.42 events per year; and tornado (violently rotating columns of air capable of catastrophic local damage) at Low risk — $2M in expected annual loss and about 0.23 events per year. Across all hazards, FEMA estimates $15M in expected annual loss for a population of 41K.
Beyond physical exposure, Isanti County has a very 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.
The county's disaster history tells the same story: Isanti County has received 10 federal disaster declarations since 1965, including 4 for flood events and 2 for biological events. The most recent was Covid-19 Pandemic (biological), declared in April 2020.
Among 87 Minnesota counties, Isanti County ranks #59 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Wildfire | Low | 0.00 / yr | $206K |
| Hail | Low | 5.42 / yr | $662K |
| Tornado | Low | 0.23 / yr | $2M |
| Strong Wind | Low | 3.65 / yr | $951K |
| Riverine Flood | Low | 0.21 / yr | $9M |
| Lightning | Low | 33.17 / yr | $303K |
| Heat Wave | Very Low | 3.00 / yr | $354K |
| Cold Wave | Low | 10.37 / yr | $1M |
| Landslide | Very Low | 0.07 / yr | $821 |
| Drought | Low | 2.25 / yr | $56K |
| Ice Storm | Low | 0.40 / yr | $48K |
| Winter Weather | Low | 16.84 / yr | $40K |
| Earthquake | Very Low | 0.00 / yr | $4K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Disaster History
Isanti County has received 10 federal disaster declarations since 1965, most recently Covid-19 Pandemic in April 2020. Most frequent causes: Flood (4), Biological (2), Severe Storm (2).
| Declared | Type | Disaster |
|---|---|---|
| April 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| July 2011 | Severe Storm | Severe Storms, Flooding, and Tornadoes |
| September 2005 | Hurricane | Hurricane Katrina Evacuation |
| May 2001 | Flood | Severe Winter Storms, Flooding, and Tornadoes |
| August 1997 | Severe Storm | Severe Storms, Tornadoes, High Winds, Flooding |
| June 1976 | Drought | Drought |
| August 1972 | Flood | Severe Storms & Flooding |
| April 1969 | Flood | Flooding |
| April 1965 | Flood | Flooding |
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Isanti County?
Isanti County has a composite FEMA National Risk Index score of 26.9 out of 100, placing it in the Very Low category and the 27th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Isanti County?
The three highest-rated hazards are Wildfire (Low, $206K EAL), Hail (Low, $662K EAL), Tornado (Low, $2M EAL). These account for most of the county's expected annual losses.
How does Isanti County compare to other Minnesota counties?
Isanti County ranks #59 of 87 Minnesota counties for overall natural disaster risk, with a very low rating.
How many federally declared disasters has Isanti County had?
FEMA records 10 federal disaster declarations for Isanti County since 1965, most often 4 for flood events and 2 for biological events. The most recent was Covid-19 Pandemic, declared in April 2020.
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. Isanti County's $15M EAL is a statistical average, not a guarantee for any specific year or address.