SkyGround

County-level natural hazard risk data for researchers

All counties

Jefferson County, NY

Population: 116,438 · FIPS code: 36045

Relatively Low Overall risk index: 64 / 100 (percentile among US counties)

Hazard breakdown

Hazard NRI rating NRI score NOAA events
(2016–2025)
Wildfire Very Low 28 0
Inland Flooding Relatively Moderate 78 11
Coastal Flooding Very Low 16.2 0
Earthquake Relatively Low 71.5 —
Heat Wave Very Low 33.6 0
Tornado Relatively Low 27.9 1

NOAA event counts are recorded county-level storm events from the NOAA Storm Events Database for 2016–2025. NOAA does not track earthquakes, and some hazard reports are filed by NWS forecast zone rather than county, so these counts are a partial, not exhaustive, record of recent activity. See the methodology page for details.

Federal disaster declaration history

Jefferson County has been included in 21 federal disaster declarations between 1973 and 2024, most recently for Tropical Storm in 2024 (REMNANTS OF TROPICAL STORM DEBBY).

Source: FEMA OpenFEMA Disaster Declarations Summaries. Counts reflect county-level declaration records (a single disaster can produce more than one record per county), not modeled risk.

Geomagnetic latitude

Jefferson County sits at approximately 53.3°N geomagnetic latitude. Aurora can become visible on the horizon here during geomagnetic storms reaching roughly Kp 7 or higher (G3 – Strong on NOAA's scale). See current space weather conditions for live geomagnetic activity and aurora forecasts.

Geomagnetic latitude is an approximate dipole-model calculation based on this county's geographic centroid (US Census Bureau). See the methodology page for details and limitations.

What these ratings mean

Each score reflects how Jefferson County's expected losses from that hazard compare to every other county in the country, based on FEMA's National Risk Index. A "Very High" rating means this county is among the most exposed in the US for that hazard relative to other counties — it does not mean a disaster is likely this year. See the methodology page for how these scores are calculated.