Chambersburg, PA
Local storm history & FEMA National Risk Index data
Chambersburg is rated Relatively Low for overall natural hazard risk — lower risk than most US counties — based on FEMA's National Risk Index for Franklin County, PA. The county's highest-rated hazards are hurricane, inland flooding, and strong wind.
Storm events near Chambersburg
NOAA-recorded tornado, hail, and flood events within 25 miles of Chambersburg's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Chambersburg 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 Franklin County's FEMA National Risk Index scores, covering Chambersburg along with the rest of the county, not a Chambersburg-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 51.3 | Very Low |
| Inland Flooding | 84.3 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 75.4 | Relatively Low |
| Heat Wave | 72.1 | Relatively Low |
| Tornado | 46.2 | Relatively Low |
| Avalanche | 48.7 | Very Low |
| Cold Wave | 20.8 | Very Low |
| Drought | 79.2 | Relatively Moderate |
| Hail | 59.7 | Relatively Low |
| Hurricane | 85.6 | Relatively Moderate |
| Ice Storm | 36.2 | Relatively Low |
| Landslide | 75.4 | Relatively Low |
| Lightning | 60.8 | Relatively Moderate |
| Strong Wind | 83.1 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 81.5 | Relatively Moderate |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Franklin County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Franklin County:
More on Franklin County:
Frequently asked questions
What natural hazards is Chambersburg, PA at risk of?
Chambersburg is rated Relatively Low for overall natural hazard risk by FEMA's National Risk Index — lower risk than most US counties. The highest-rated hazards for Franklin County, where Chambersburg is located, are hurricane, inland flooding, and strong wind.
What is Chambersburg's biggest natural hazard risk?
Hurricane is the highest-rated hazard for Franklin County, where Chambersburg is located, scoring 85.6 out of 100 on FEMA's National Risk Index (rated "Relatively Moderate").
Is Chambersburg a high-risk area for natural disasters?
No — Chambersburg carries lower risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Low" for Franklin County.
Has Chambersburg had tornadoes, hail, or flooding?
NOAA has recorded 4 tornado, 49 hail, 75 inland flooding events within 25 miles of Chambersburg since 2016.