Norwalk, IA
Local storm history & FEMA National Risk Index data
Norwalk is rated Very Low for overall natural hazard risk — among the lowest-risk counties in the country — based on FEMA's National Risk Index for Warren County, IA. The county's highest-rated hazards are drought, landslide, and tornado.
Storm events near Norwalk
NOAA-recorded tornado, hail, and flood events within 25 miles of Norwalk's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Norwalk itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Warren County's FEMA National Risk Index scores, covering Norwalk along with the rest of the county, not a Norwalk-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 59.4 | Very Low |
| Inland Flooding | 35.9 | Relatively Low |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 20.5 | Very Low |
| Heat Wave | 65.5 | Relatively Low |
| Tornado | 65.9 | Relatively Moderate |
| Avalanche | — | Not Applicable |
| Cold Wave | 47.6 | Relatively Low |
| Drought | 91.7 | Relatively High |
| Hail | 49.2 | Relatively Low |
| Hurricane | 7.6 | Very Low |
| Ice Storm | 51.3 | Relatively Low |
| Landslide | 72.4 | Relatively Low |
| Lightning | 60.5 | Relatively Moderate |
| Strong Wind | 55 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 25.7 | Relatively Low |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Warren County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Warren County:
More on Warren County:
Frequently asked questions
What natural hazards is Norwalk, IA at risk of?
Norwalk is rated Very Low for overall natural hazard risk by FEMA's National Risk Index — among the lowest-risk counties in the country. The highest-rated hazards for Warren County, where Norwalk is located, are drought, landslide, and tornado.
What is Norwalk's biggest natural hazard risk?
Drought is the highest-rated hazard for Warren County, where Norwalk is located, scoring 91.7 out of 100 on FEMA's National Risk Index (rated "Relatively High").
Is Norwalk a high-risk area for natural disasters?
No — Norwalk carries among the lowest-risk counties in the country for overall natural hazard risk, per FEMA's National Risk Index rating of "Very Low" for Warren County.
Has Norwalk had tornadoes, hail, or flooding?
NOAA has recorded 45 tornado, 315 hail, 113 inland flooding events within 25 miles of Norwalk since 2016.