Anoka County, Minnesota: Natural Disaster Risk and History
Anoka County, Minnesota has a Relatively Moderate natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 88.0 out of 100, higher than about 88% of US counties, with strong winds, hail and inland (river and flash) flooding scoring highest of its 18 hazards and $127 million a year in expected losses.
OpenFEMA lists 11 federal disaster declarations that included Anoka County since 1965, not counting 2 for COVID-19; the latest is DR-1990-MN (Severe Storms and Tornadoes, declared 7 June 2011). NOAA's Storm Prediction Center recorded 28 tornadoes touching Anoka County from 1950 to 2025.
Live weather alerts for Minnesota All official warnings Latest FEMA declarations
Population 363,857 Buildings worth $73 billion Area 451 sq mi Risk rank in Minnesota 5 of 87 FIPS 27003
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Strong wind | Very High | 98.8 | $13 million | about 4.3 a year | 166 |
| Hail | Relatively High | 96.2 | $6.4 million | about 6.2 a year | 235 |
| Inland flooding | Relatively Moderate | 92.0 | $85 million | about once every 1.6 years | 17 |
| Lightning | Relatively High | 92.0 | $2.4 million | about 34 a year | 217,567 strikes |
| Tornado | Relatively Moderate | 87.2 | $11 million | about once every 3.3 years | 24 |
| Heat wave | Relatively Moderate | 86.1 | $4.0 million | about 6 a year | 90 |
| Winter weather | Relatively Moderate | 84.1 | $462,859 | about 17 a year | 318 |
| Wildfire | Relatively Low | 81.6 | $850,599 | rarer than once in 1,000 years | — |
| Ice storm | Relatively Moderate | 77.0 | $588,430 | about once every 1.7 years | 39 |
| Cold wave | Relatively Moderate | 71.2 | $4.0 million | about 9.2 a year | 175 |
| Landslide | Very Low | 43.4 | $1,522 | about once every 13 years | — |
| Drought | Very Low | 29.0 | $39,020 | about 2.2 a year | 196 |
| Earthquake | Very Low | 23.2 | $66,385 | rarer than once in 1,000 years | — |
| Avalanche | Not Applicable | — | — | — | — |
| Coastal flooding | Not Applicable | — | — | — | — |
| Hurricane | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 11
Most common: Flood 4, Severe Storm 3, Hurricane 1, Fire 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 1960s | 2 | Flood ×2 |
| 1970s | 1 | Drought |
| 1980s | 1 | Severe Storm |
| 1990s | 3 | Tornado, Severe Storm, Flood |
| 2000s | 3 | Hurricane, Flood, Fire |
| 2010s | 1 | Severe Storm |
The last 10
Widest declarations that included Anoka County
- Hurricane Katrina Evacuation (2005, EM-3242-MN): 87 Minnesota counties designated.
- Drought (1976, EM-3013-MN): 78 Minnesota counties designated.
- Flooding (1969, DR-255-MN): 70 Minnesota counties designated.
Named storms in its declarations: Hurricane Katrina (2005).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Minnesota also had 9 statewide declarations with no county list.
Tornado record since 1950 28
| Tornadoes touching the county | 28 |
|---|---|
| Strongest-rated | (E)F4 ×3 |
| Peak month | May (8) |
| Deadliest | 6 May 1965, F4, 6.8 mi path, 3 killed, 175 injured |
| Longest path | 24 Jun 1952, F2, 70.9 mi path, 0 killed, 15 injured |
| Most recent | 29 Aug 2024, EF1, 3.6 mi path |
| Deaths / injuries on those paths | 7 / 287 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 10 | 10 | 4 | 1 | 3 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 2 | 4 | 1 | 3 | 3 | 6 | 6 | 3 |
Deaths and injuries are for each tornado's whole path, which can run beyond this county. F-scale ratings before February 2007, Enhanced Fujita (EF) after.
How Anoka County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Anoka County (this page) | — | Relatively Moderate | 88.0 | Strong wind |
| Ramsey County | 31 km | Relatively High | 94.6 | Cold wave |
| Isanti County | 32 km | Very Low | 26.9 | Wildfire |
| Hennepin County | 35 km | Relatively High | 98.3 | Cold wave |
| Chisago County | 37 km | Relatively Low | 44.5 | Strong wind |
| Washington County | 39 km | Relatively Moderate | 83.9 | Strong wind |
Nearest by distance between county centres. Every county in Minnesota, ranked.
Vulnerability and resilience
| Social vulnerability | Very Low 10.6 |
|---|---|
| Community resilience | Very High 97.1 |
| Community risk factor | 0.59 |
| Expected annual loss, all hazards | $127 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Anoka County's main hazards
- Right now: National Weather Service alerts for Minnesota · all official warnings on Global Incident Tracker.
- Strong wind: Power outages now
- Hail: Weather alerts for Minnesota
- Inland flooding: Flood safety: why shallow water kills · Floods recorded
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Anoka County
What natural disasters is Anoka County, Minnesota most at risk from?
Anoka County, Minnesota has a Relatively Moderate natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 88.0 out of 100, higher than about 88% of US counties, with strong winds, hail and inland (river and flash) flooding scoring highest of its 18 hazards and $127 million a year in expected losses.
How many federal disaster declarations has Anoka County had?
OpenFEMA lists 11 federal disaster declarations that included Anoka County since 1965, not counting 2 for COVID-19; the latest is DR-1990-MN (Severe Storms and Tornadoes, declared 7 June 2011). Another 9 Minnesota declarations were made statewide without a county list.
How many tornadoes have hit Anoka County?
NOAA's Storm Prediction Center recorded 28 tornadoes touching Anoka County from 1950 to 2025. The deadliest: 6 May 1965, F4, 6.8 mi path, 3 killed, 175 injured (deaths and injuries are for the whole path).
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.